A fast and efficient automated classification and analysis device for organic matter in water and its application

Abstract

A fast and efficient automated classification and analysis device for organic matter in water and its application. The device comprises a housing (1), wherein a first multi-channel selection control valve (5), a detector (28), a background channel and a polarity classification channel connected in parallel are arranged inside the housing (1), one end of the background channel is connected to the first multi-channel selection control valve (5), and the other end of the background channel is connected to the detector (28), one end of the polarity classification channel is connected to the first multi-channel selection control valve (5), and the other end of the polarity classification channel is connected to the detector (28), the polarity classification channel is arranged to intercept target substances in a sample to be tested, and the first multi-channel selection control valve (5) is arranged to be connected to an input pipeline of the sample to be tested. The device of the present application can quickly and efficiently analyze the composition and content of dissolved organic matter in water.

Description

Technical Field

[0001] The present application relates to the field of analysis and detection, and in particular to a fast and efficient automatic classification and analysis device for organic matter in water and its application. Background Art

[0002] Disinfection is the most important means to ensure the safety of drinking water and avoid large-scale waterborne epidemics. It is an irreplaceable basic process for water plants. However, when water is disinfected, some disinfection by-products that pose a huge threat to humans are also produced. In 1974, researchers detected chloroform in drinking water after chlorination, which attracted the attention of the water treatment industry to the problem of disinfection by-products. With the advancement of detection technology, more halogenated disinfection by-products have been identified, including trihalomethanes, haloacetic acids, halogenated aldehydes, halogenated ketones, halogenated alcohols, etc. According to statistics, more than 600 types of disinfection by-products have been identified.

[0003] In addition to the above-mentioned halogenated disinfection byproducts, researchers have found that there are even more trace amounts of nitrogen-containing disinfection byproducts (including nitrosamines, halogenated amides, halogenated nitromethanes, halogenated acetonitriles, etc.) and iodinated disinfection byproducts (including iodinated trihalomethanes, iodinated haloacetic acids, etc.) in water, which are usually referred to as emerging disinfection byproducts. These emerging disinfection byproducts are often more likely to be produced in tap water disinfected with chloramines, but are not easily produced when free chlorine is used for disinfection due to different reaction pathways.

[0004] Studies have found that various organic substances in water are important precursors to the formation of carbon-containing disinfection by-products such as trihalomethanes and haloacetic acids, and nitrogen-containing disinfection by-products such as nitrosamines, haloacetonitriles, and halogenated amides. Natural organic matter is a complex combination of organic compounds formed by the decay of plant and animal matter in water sources and soil. It is an important source of organic pollutants in water. It is not only a carrier for the attachment of toxic and harmful substances, but also a precursor of drinking water disinfection by-products. Man-made pollutants, including some components contained in domestic sewage and industrial wastewater, such as soluble microbial metabolites, amino acids, proteins, pharmaceuticals and personal care products, have also been proven to be important sources of disinfection by-product precursors.

[0005] Since dissolved organic matter in water is an important precursor of disinfection by-products, and as the threat of disinfection by-products to drinking water health continues to increase, the requirements for drinking water quality standards continue to increase. The changes in dissolved organic matter components in water can be used as a basis for studying the properties of disinfection by-products. Therefore, methods for quickly separating and detecting changes in dissolved organic matter components in water are crucial. Although some classic analytical methods for the macroscopic properties of organic components in water have played an important role in studying the composition and content of dissolved organic matter in water, they also have disadvantages such as complex operation, slow detection speed, high labor intensity, and low recovery rate of organic matter. Summary of the invention

[0006] The present application provides an automated classification and analysis device and its application, which can quickly and efficiently analyze the composition and content of soluble organic matter in water.

[0007] The present application provides a fast and efficient automatic classification and analysis device for organic matter in water, the device includes a shell, a first multi-channel selection control valve, a detector, a background channel and a polarity classification channel in parallel are arranged inside the shell, one end of the background channel is connected to the first multi-channel selection control valve, the other end of the background channel is connected to the detector, one end of the polarity classification channel is connected to the first multi-channel selection control valve, the other end of the polarity classification channel is connected to the detector, the polarity classification channel is configured to intercept target substances in a sample to be tested, and the first multi-channel selection control valve is configured to be connected to an input pipeline of the sample to be tested.

[0008] In an embodiment of the present application, the polarity classification channel may include any one or more of the following three types:

[0009] A first polarity classification channel, wherein the first polarity classification channel is configured to intercept negatively charged substances in the sample to be tested;

[0010] A second polarity classification channel, wherein the second polarity classification channel is configured to intercept non-polar substances in the sample to be tested;

[0011] A third polarity classification channel, wherein the third polarity classification channel is configured to intercept positively charged substances in the sample to be tested.

[0012] In an embodiment of the present application, when the polarity classification channel includes the first polarity classification channel, one or more first polarity classification channels may be provided; when the polarity classification channel includes the second polarity classification channel, one or more second polarity classification channels may be provided; when the polarity classification channel includes the third polarity classification channel, one or more third polarity classification channels may be provided.

[0013] In an embodiment of the present application, the first polarity classification channel may include a second multi-channel selective control valve, a second injection pump, a first polarity classification unit and a third multi-channel selective control valve connected in sequence, an end of the second multi-channel selective control valve away from the second injection pump is connected to the first multi-channel selective control valve, an end of the third multi-channel selective control valve away from the first polarity classification unit is connected to the detector, and the second multi-channel selective control valve is connected to a first solvent bottle and a third solvent bottle arranged outside the housing.

[0014] In an embodiment of the present application, the second polarity classification channel may include a fourth multi-channel selective control valve, a third injection pump, a second polarity classification unit and a fifth multi-channel selective control valve connected in sequence, an end of the fourth multi-channel selective control valve away from the third injection pump is connected to the first multi-channel selective control valve, an end of the fifth multi-channel selective control valve away from the second polarity classification unit is connected to the detector, and the fourth multi-channel selective control valve is connected to a second solvent bottle and a third solvent bottle arranged outside the housing.

[0015] In an embodiment of the present application, the third polarity classification channel may include a first online pH adjustment device, a second filter, a second online pH adjustment device, a sixth multi-channel selective control valve, a fourth injection pump, a third polarity classification unit and a seventh multi-channel selective control valve connected in sequence, the end of the first online pH adjustment device away from the second filter is connected to the first multi-channel selective control valve, the end of the seventh multi-channel selective control valve away from the third polarity classification unit is connected to the detector, the first online pH adjustment device is connected to a fourth solvent bottle arranged outside the outer shell, the second online pH adjustment device is connected to a fifth solvent bottle arranged outside the outer shell, and the sixth multi-channel selective control valve is connected to the second solvent bottle, the third solvent bottle, and the sixth solvent bottle arranged outside the outer shell.

[0016] In an embodiment of the present application, the first polarity classification unit may be a strong anion exchange column.

[0017] Optionally, the first polarity classification unit may be a SAX column or a DEA column. Preferably, the first polarity classification unit is a SAX column.

[0018] In an embodiment of the present application, the first polarity classification unit may be a solid phase extraction column or a packed filter column.

[0019] In an embodiment of the present application, the second polarity classification unit may be a C18 column or a C8 column. Preferably, the second polarity classification unit is a C18 column.

[0020] In an embodiment of the present application, the second polarity classification unit may be a solid phase extraction column or a packed filter column.

[0021] In an embodiment of the present application, the third polarity classification unit may be a strong cation exchange column.

[0022] Optionally, the third polarity classification unit may be an SCX column or a PRS column. Preferably, the third polarity classification unit is an SCX column.

[0023] In an embodiment of the present application, the third polarity classification unit may be a solid phase extraction column or a packed filter column.

[0024] In an embodiment of the present application, the detector may include any one or more of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer, and a total nitrogen analyzer.

[0025] In an embodiment of the present application, when the detector includes multiple types of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer, and a total nitrogen analyzer, an eighth multi-channel selection control valve is provided between the polarity classification channel and the detector.

[0026] In an embodiment of the present application, the device may further include a sample bottle and a waste liquid collection device disposed outside the housing;

[0027] The sample bottle is connected to the first multi-channel selective control valve, and a peristaltic pump and a first filter are sequentially arranged inside the housing between the sample bottle and the first multi-channel selective control valve;

[0028] The waste liquid collecting device is respectively connected to the background channel and one end of the polarity classification channel close to the detector and the detector.

[0029] In an embodiment of the present application, a first injection pump may be provided on the background channel.

[0030] The present application also provides the use of the above-mentioned automatic classification and analysis equipment for organic matter in water in analyzing the composition and content of soluble organic matter in water.

[0031] In the application examples of the present application,

[0032] When used to analyze the composition and content of nitrogen-containing dissolved organic matter in water, the polarity classification channel may include a second polarity classification channel and a third polarity classification channel;

[0033] When used to analyze the composition and content of carbon-containing dissolved organic matter in water, the polarity classification channel may include a first polarity classification channel, a second polarity classification channel and a third polarity classification channel.

[0034] The automated classification and analysis equipment for organic matter in water of the present application has the advantages of strong pertinence, high degree of automation, convenience and speed, etc. It can meet the classification and analysis research of complex organic matter components in water in the water treatment industry and has a good guiding role in the optimization of water treatment processes.

[0035] Furthermore, the automatic classification and analysis equipment for organic matter in water of the present application can control the injection speed of the injection pump so that the precursors of disinfection byproducts in the water sample can be adsorbed as much as possible, thereby improving the adsorption effect of the polarity classification unit; by setting polarity classification units with different adsorption effects, the precursors of disinfection byproducts can be adsorbed in a targeted manner; a communication module can be set in the detector so that the detector can be connected to an online analysis terminal, thereby achieving the purpose of real-time monitoring of the dynamic changes of the precursors; a circulation device can also be set in the detector to collect waste liquid in time, which can not only repeat the test but also ensure that no pollution is caused to the environment.

[0036] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0038] Figure 1 This is a front view structural diagram of a fast and efficient automated classification and analysis device for organic matter in water according to an embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the front cross-sectional structure of a fast and efficient automated classification and analysis device for organic matter in water according to an embodiment of the present application.

[0040] The meanings of the symbols in the accompanying drawings are:

[0041] 1-housing; 2-sample bottle; 3-peristaltic pump; 4-first filter; 5-first multi-channel selection control valve; 6-first injection pump; 7-second multi-channel selection control valve; 8-second injection pump; 9-first polarity classification unit; 10-third multi-channel selection control valve; 11-fourth multi-channel selection control valve; 12-third injection pump; 13-second polarity classification unit; 14-fifth multi-channel selection control valve; 15-first online pH adjustment device; 16-second filter; 17 second online pH adjustment device; 18-sixth multi-channel selection control valve; 19-fourth injection pump; 20-third polarity classification unit; 21-seventh multi-channel selection control valve; 22-first solvent bottle; 23-second solvent bottle; 24-third solvent bottle; 25-fourth solvent bottle; 26-fifth solvent bottle; 27-sixth solvent bottle; 28-detector; 29-waste liquid collection device. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0043] The present application provides a fast and efficient automatic classification and analysis device for organic matter in water, such as Figure 1 and Figure 2 As shown, the device includes a shell 1, and a first multi-channel selection control valve 5, a detector 28, a background channel and a polarity classification channel in parallel are arranged inside the shell 1, one end of the background channel is connected to the first multi-channel selection control valve 5, and the other end of the background channel is connected to the detector 28, one end of the polarity classification channel is connected to the first multi-channel selection control valve 5, and the other end of the polarity classification channel is connected to the detector 28, the polarity classification channel is configured to intercept the target substance in the sample to be tested, and the first multi-channel selection control valve 5 is configured to be connected to the input pipeline of the sample to be tested.

[0044] In an embodiment of the present application, the polarity classification channel may include any one or more of the following three types:

[0045] A first polarity classification channel, wherein the first polarity classification channel is configured to intercept negatively charged substances in the sample to be tested;

[0046] A second polarity classification channel, wherein the second polarity classification channel is configured to intercept non-polar substances in the sample to be tested;

[0047] A third polarity classification channel, wherein the third polarity classification channel is configured to intercept positively charged substances in the sample to be tested.

[0048] In an embodiment of the present application, when the polarity classification channel includes the first polarity classification channel, one or more first polarity classification channels may be provided; when the polarity classification channel includes the second polarity classification channel, one or more second polarity classification channels may be provided; when the polarity classification channel includes the third polarity classification channel, one or more third polarity classification channels may be provided.

[0049] In an embodiment of the present application, the first polarity classification channel may include a second multi-channel selective control valve 7, a second injection pump 8, a first polarity classification unit 9 and a third multi-channel selective control valve 10 connected in sequence, the end of the second multi-channel selective control valve 7 away from the second injection pump 8 is connected to the first multi-channel selective control valve 5, the end of the third multi-channel selective control valve 10 away from the first polarity classification unit 9 is connected to the detector 28, and the second multi-channel selective control valve 7 is connected to the first solvent bottle 22 and the third solvent bottle 24 arranged outside the housing 1.

[0050] In an embodiment of the present application, the second polarity classification channel may include a fourth multi-channel selective control valve 11, a third injection pump 12, a second polarity classification unit 13 and a fifth multi-channel selective control valve 14 connected in sequence, the end of the fourth multi-channel selective control valve 11 away from the third injection pump 12 is connected to the first multi-channel selective control valve 5, the end of the fifth multi-channel selective control valve 14 away from the second polarity classification unit 13 is connected to the detector 28, and the fourth multi-channel selective control valve 11 is connected to the second solvent bottle 23 and the third solvent bottle 24 arranged outside the housing 1.

[0051] In an embodiment of the present application, the third polarity classification channel may include a first online pH adjustment device 15, a second filter 16, a second online pH adjustment device 17, a sixth multi-channel selective control valve 18, a fourth injection pump 19, a third polarity classification unit 20 and a seventh multi-channel selective control valve 21 connected in sequence, the end of the first online pH adjustment device 15 away from the second filter 16 is connected to the first multi-channel selective control valve 5, the end of the seventh multi-channel selective control valve 21 away from the third polarity classification unit 20 is connected to the detector 28, the first online pH adjustment device 15 is connected to a fourth solvent bottle 25 arranged outside the outer shell 1, the second online pH adjustment device 17 is connected to a fifth solvent bottle 26 arranged outside the outer shell 1, and the sixth multi-channel selective control valve 18 is connected to a second solvent bottle 23, a third solvent bottle 24, and a sixth solvent bottle 27 arranged outside the outer shell 1.

[0052] In an embodiment of the present application, the first polarity classification unit 9 can be a strong anion exchange column. Optionally, the first polarity classification unit 9 can be a SAX column or a DEA column, for example, it can be a SAX column filled with trimethylaminopropyl / silica gel or a DEA column filled with diethylaminopropyl / silica gel; preferably, the first polarity classification unit 9 is a SAX column; the SAX column can be an Agilent Bond Elut SAX column.

[0053] In an embodiment of the present application, the first polarity classification unit 9 may be a solid phase extraction column or a packed filter column.

[0054] In an embodiment of the present application, the second polar classification unit 13 can be a C18 column or a C8 column, for example, it can be a C18 column filled with a trifunctional octadecyl / silica gel group or a C8 column filled with an octyl / silica gel group; preferably, the second polar classification unit 13 is a C18 column; the C18 column can be an Agilent Bond Elut C18 column, and the C8 column can be an Agilent Bond Elut C8 column or an Extract Clean SPE C8 column purchased from Alltech Associates.

[0055] In an embodiment of the present application, the second polarity classification unit 13 may be a solid phase extraction column or a packed filter column.

[0056] In an embodiment of the present application, the third polar classification unit 20 can be a strong cation exchange column. Optionally, the third polar classification unit 20 can be an SCX column or a PRS column, for example, it can be an SCX column filled with benzenesulfonic acid / silica gel or a PRS column filled with propylsulfonic acid / silica gel; preferably, the third polar classification unit 20 is an SCX column; the SCX column can be an Agilent Bond Elut SCX column.

[0057] In the embodiment of the present application, the third polarity classification unit 20 may be a solid phase extraction column or a packed filter column.

[0058] In an embodiment of the present application, the first multi-channel selection control valve 5 can be controlled so that the sample to be tested enters the background channel, the first polarity classification channel, the second polarity classification channel and the third polarity classification channel at the same time, or enters the background channel, the first polarity classification channel, the second polarity classification channel and the third polarity classification channel respectively according to the designed order.

[0059] In an embodiment of the present application, the detector 28 may include any one or more of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer, and a total nitrogen analyzer.

[0060] In an embodiment of the present application, when the detector 28 includes multiple types of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer and a total nitrogen analyzer, an eighth multi-channel selection control valve can be arranged between the polarity classification channel and the detector 28, and the eighth multi-channel selection control valve can be used to select the polarity classification channel to be connected to the ultraviolet-visible spectrophotometer, the total organic carbon analyzer or the total nitrogen analyzer.

[0061] In the embodiment of the present application, the detector 28 may be provided with a communication module, so that the detector 28 can be connected to an online analysis terminal, and the data detected by the detector 28 can be analyzed online, so as to achieve the purpose of real-time monitoring of the dynamic changes of the precursor. The detector 28 may also be provided with a circulation device, which can collect waste liquid in time, so as to repeat the detection and ensure that no pollution is caused to the environment.

[0062] In an embodiment of the present application, the device may further include a sample bottle 2 and a waste liquid collection device 29 disposed outside the housing 1;

[0063] The sample bottle 2 is connected to the first multi-channel selective control valve 5, and a peristaltic pump 3 and a first filter 4 are sequentially arranged inside the housing 1 between the sample bottle 2 and the first multi-channel selective control valve 5;

[0064] The waste liquid collecting device 29 is connected to the background channel and one end of the polarity classification channel close to the detector 28 and the detector 28 respectively.

[0065] In an embodiment of the present application, a first injection pump 6 may be provided on the background channel.

[0066] The embodiments of the present application also provide the use of the above-mentioned automatic classification and analysis equipment for organic matter in water in analyzing the composition and content of soluble organic matter in water.

[0067] In the application examples of the present application,

[0068] When used to analyze the composition and content of nitrogen-containing dissolved organic matter in water, the polarity classification channel may include a second polarity classification channel and a third polarity classification channel;

[0069] When used to analyze the composition and content of carbon-containing dissolved organic matter in water, the polarity classification channel may include a first polarity classification channel, a second polarity classification channel and a third polarity classification channel.

[0070] The first online pH regulating device 15 and the second online pH regulating device 17 used in the following embodiments are both HQ40d pH / ORP detectors purchased from Hach;

[0071] The detector 28 includes a UV-2700 ultraviolet-visible spectrophotometer of Shimadzu Corporation, a TOC-V CPH Model total organic carbon analyzer and Shimadzu TNM-1 model total nitrogen analyzer.

[0072] Example 1

[0073] like Figure 1 and Figure 2As shown, the fast, efficient and automated classification and analysis equipment of this embodiment is provided with a background channel, a first polarity classification channel, a second polarity classification channel and a third polarity classification channel, so that the detector 28 can selectively sample and detect from the four channels, and realize online real-time dynamic monitoring in the detector 28, so that people can intuitively view the operating status of the equipment and the changes in the organic matter content in the water sample on the mobile terminal.

[0074] The first polarity classification unit 9 of the first polarity classification channel is a SAX solid phase extraction cartridge, which is an Agilent BondElut SAX cartridge; the second polarity classification unit 13 of the second polarity classification channel is a C18 solid phase extraction cartridge, which is an Agilent BondElut C18 cartridge; the third polarity classification unit 20 of the third polarity classification channel is an SCX solid phase extraction cartridge, which is an Agilent BondElut SCX cartridge.

[0075] The first solvent bottle 22 contains dichloromethane, and may also contain other suitable organic solvents; the second solvent bottle 23 and the third solvent bottle 24 contain methanol solution and ultrapure water respectively; the fourth solvent bottle 25 contains NaOH solution, and may also contain other suitable alkaline solutions; the fifth solvent bottle 26 contains HCl solution, and may also contain other suitable acid solutions; the sixth solvent bottle 27 contains NaCl solution.

[0076] The workflow of the automated classification and analysis equipment of this embodiment is as follows: before use, check the reserves of the selected dichloromethane, methanol solution, ultrapure water and NaCl solution, as well as the NaOH solution and HCl solution in the online pH adjustment device, and check the use of the three solid phase extraction columns. When in use, turn on the power of the equipment, put the water sample to be tested into the sample bottle 2, the peristaltic pump 3 will pass the sample to be tested in the sample bottle 2 into the equipment after passing through the first filter 4, and distribute the channels through the first multi-channel selection control valve 5, wherein the raw water of the water sample to be tested is in the zero channel, flows through the first injection pump 6, and enters the detector 28, the detector 28 will obtain the value of the raw water quality, and transmit the signal in the detector 28 to the mobile terminal for recording.

[0077] When classifying and analyzing carbon-containing soluble organic matter in water, such as trihalomethane precursors, the first polarity classification channel, the second polarity classification channel, and the third polarity classification channel are used for classification and analysis at the same time. At this time, the UV-visible spectrophotometer and the total organic carbon analyzer can be used to obtain the UV value and TOC value of the water respectively, without the need for a total nitrogen analyzer. When classifying and analyzing nitrogen-containing soluble organic matter in water, such as nitrosamine precursors, the second polarity classification channel and the third polarity classification channel are used for classification and analysis. At this time, the UV-visible spectrophotometer, the total organic carbon analyzer, and the total nitrogen analyzer can be used to obtain the UV value, TOC value, and TN value of the water respectively.

[0078] The total organic matter content in the sample to be tested is detected through the background channel: the first multi-channel selection control valve 5 controls the sample input pipeline where the sample bottle 2 is located to be connected to the background channel, so that the sample to be tested contained in the sample bottle 2 enters the background channel after passing through the peristaltic pump 3 and the first filter 4, and then enters the detector 28. By observing the real-time data of the detector 28, the total organic matter content in the raw water sample is obtained, and the detected sample directly flows into the waste liquid collection device 29.

[0079] The SAX solid phase extraction column is first activated in the first polarity classification channel, and the second multi-channel selection control valve 7 is controlled to be connected with the first solvent bottle 22. The dichloromethane contained in the first solvent bottle 22 enters the first polarity classification unit 9 through the second injection pump 8 to activate the SAX solid phase extraction column. Then the second multi-channel selection control valve 7 is controlled to be connected with the third solvent bottle 24, and the SAX solid phase extraction column is cleaned with ultrapure water contained in the third solvent bottle 24. After the SAX solid phase extraction column is activated and cleaned, the waste liquid directly enters the waste liquid collection device 29 through the third multi-channel selection control valve 10, and the activity of the SAX solid phase extraction column is activated. Then, the first multi-channel selection control valve 5 and the second multi-channel selection control valve 7 control the sample input pipeline where the sample bottle 2 is located to be connected to the first polarity classification channel, so that the sample to be tested contained in the sample bottle 2 is selected by the second multi-channel selection control valve 7 and enters the SAX solid phase extraction column through the second injection pump 8, wherein part of the organic matter (i.e., negatively charged organic matter) in the raw water sample is intercepted by the SAX solid phase extraction column, and the intercepted water sample enters the detector 28 through the third multi-channel selection control valve 10. By observing the real-time data of the detector 28, the organic matter content in the sample to be tested after interception is obtained, wherein the difference is the organic matter content that can be adsorbed by the SAX solid phase extraction column, and the detected sample directly flows into the waste liquid collection device 29.

[0080] The C18 solid phase extraction column is first activated in the second polarity classification channel, and the fourth multi-channel selection control valve 11 is controlled to be connected to the second solvent bottle 23 or the third solvent bottle 24 respectively. The methanol solution and ultrapure water contained in the second solvent bottle 23 and the third solvent bottle 24 pass through the third injection pump 12 respectively, and enter the second polarity classification unit 13 to activate and clean the C18 solid phase extraction column respectively. After that, the waste liquid directly enters the waste liquid collection device 29 through the fifth multi-channel selection control valve 14, and the activity of the C18 solid phase extraction column is activated. Then, the first multi-channel selection control valve 5 and the fourth multi-channel selection control valve 11 control the sample input pipeline where the sample bottle 2 is located to be connected to the second polarity classification channel, so that the sample to be tested contained in the sample bottle 2 is selected by the fourth multi-channel selection control valve 11 and enters the C18 solid phase extraction column through the third injection pump 12, wherein part of the organic matter (i.e., non-polar organic matter) in the raw water sample is intercepted by the C18 solid phase extraction column, and the intercepted water sample enters the detector 28 through the fifth multi-channel selection control valve 14. By observing the real-time data of the detector 28, the organic matter content in the sample to be tested after interception is obtained, wherein the difference is the organic matter content that can be adsorbed by the C18 solid phase extraction column, and the detected sample directly flows into the waste liquid collection device 29.

[0081] The SCX solid phase extraction column is first activated in the third polarity classification channel: the sixth multi-channel selection control valve 18 is controlled to be connected to the second solvent bottle 23, the third solvent bottle 24 or the sixth solvent bottle 27 respectively, and the methanol solution contained in the second solvent bottle 23, the ultrapure water contained in the third solvent bottle 24 and the NaCl solution contained in the sixth solvent bottle 27 are respectively activated and cleaned by the fourth injection pump 19 to the third polarity classification unit 20 (SCX solid phase extraction column). After the SCX solid phase extraction column is activated and cleaned, the waste liquid directly enters the waste liquid collection device 29 through the seventh multi-channel selection control valve 21, and the activity of the SCX solid phase extraction column is activated. Then the pH value of the water sample is adjusted and the water sample is tested: the water sample to be tested is selected to enter the third polarity classification channel through the first multi-channel selection control valve 5, and the first online pH adjustment device 15 first adjusts the water sample to be tested to alkaline, wherein the first online pH adjustment device 15 is connected to the fourth solvent bottle 25 containing NaOH solution, and after being filtered by the second filter 16, it enters the second online pH adjustment device 17, at which time the water sample to be tested is adjusted to acidic, wherein the second online pH adjustment device 17 is connected to the fifth solvent bottle 26 containing HCl solution, and the pH value of the water sample to be tested is adjusted, and is selected by the sixth multi-channel selection control valve 5. The control valve 18 is selectively controlled so that the water sample after pH adjustment is selected by the sixth multi-channel selection control valve 18 and enters the SCX solid phase extraction column through the fourth injection pump 19, wherein part of the organic matter (i.e., positively charged organic matter) in the raw water sample is retained by the SCX solid phase extraction column, and the retained water sample enters the detector 28 through the seventh multi-channel selection control valve 21. By observing the real-time data of the detector 28, the organic matter content in the sample to be tested after retention is obtained, wherein the difference is the organic matter content that can be adsorbed by the SCX solid phase extraction column, and the tested sample directly flows into the waste liquid collection device 29.

[0082] The inventors of the present application investigated the adsorption capacity of various SPE columns for known NDMA (N-nitrosodimethylamine) precursors (dimethylamine, chlorpheniramine, benzalkonium chloride, ranitidine).

[0083] Among them, the types and sources of various SPE columns are shown in Table 1:

[0084] Table 1 Types and sources of SPE cartridges

[0085]

[0086] The experimental results are shown in Table 2.

[0087] Table 2 Adsorption capacity of SPE cartridges for known NDMA precursors

[0088]

[0089] It can be seen that among the numerous polar non-polar columns, the C18 column and the C8 column have stronger adsorption capacity for the above-mentioned NDMA precursors; the SCX column among the strong cation exchange columns has stronger adsorption capacity for the above-mentioned NDMA precursors.

[0090] The raw water test was conducted using the classification and analysis equipment of Example 1 of the present application. The water sample was collected from a lake affected by aquaculture in the Yangtze River Delta, China. The RSD was determined by performing three replicate tests on the water sample. The ultraviolet absorbance (SUVA) was low, indicating that the humus content in the water was low. The DOC / DON ratio was less than 10 mg C / mg N, indicating that the water was rich in nitrogen.

[0091] Pretreatment: Store them in cleaned and ashed (at 550°C) 1 L amber glass bottles with PTFE coated caps. Add 1 ml of 50 mM sodium sulfite (Na 2 SO 3 ) solution was added to all final water samples to quench any residual disinfectant and immediately filtered through an ash (at 500°C) glass fiber filter.

[0092] The experimental results are shown in Table 3.

[0093] Table 3 Raw water test evaluation table

[0094]

[0095] Ozone was introduced into a glass reactor containing 2L of test water. The ozone concentration of the input gas and the output gas was determined by a portable ozone analyzer. The flux of the ozonated gas was carefully adjusted to achieve an ozone dose of 1mg / L in the test water. The water quality test results before and after ozone oxidation are shown in Table 4.

[0096] Table 4 Water treatment oxidation process test evaluation table

[0097]

[0098] The water samples were treated with powdered activated carbon (PAC) for adsorption. 50 mg / L PAC was placed in a 2L glass bottle containing the test water. The samples were mixed using a rotary shaker at 200 rpm. After 24 hours, the samples were taken from these bottles and filtered through a 0.45 μm membrane to remove the PAC. Due to the higher alkalinity (such as CaCO 3 ), during the experiment, the pH value was stable at about 8.0. The water quality test results before and after the water treatment adsorption process are shown in Table 5.

[0099] Table 5 Water treatment adsorption process test evaluation table

[0100]

[0101] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any technician in the field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. A fast and efficient automatic classification and analysis device for organic matter in water, characterized in that: The device comprises a housing (1), wherein a first multi-channel selective control valve (5), a detector (28), a background channel and a polarity classification channel connected in parallel are arranged inside the housing (1), one end of the background channel is connected to the first multi-channel selective control valve (5), and the other end of the background channel is connected to the detector (28), one end of the polarity classification channel is connected to the first multi-channel selective control valve (5), and the other end of the polarity classification channel is connected to the detector (28), the polarity classification channel is arranged to intercept a target substance in a sample to be tested, and the first multi-channel selective control valve (5) is arranged to be connected to an input pipeline of the sample to be tested; The polarity classification channels include any one of the following three types or multiple types arranged in parallel: A first polarity classification channel, wherein the first polarity classification channel is configured to intercept negatively charged substances in the sample to be tested; A second polarity classification channel, wherein the second polarity classification channel is configured to intercept non-polar substances in the sample to be tested; A third polarity classification channel, wherein the third polarity classification channel is configured to intercept positively charged substances in the sample to be tested.

2. The automatic classification and analysis equipment for organic matter in water according to claim 1 is characterized in that: When the polarity classification channel includes the first polarity classification channel, one or more first polarity classification channels are provided; when the polarity classification channel includes the second polarity classification channel, one or more second polarity classification channels are provided; when the polarity classification channel includes the third polarity classification channel, one or more third polarity classification channels are provided.

3. The automatic classification and analysis equipment for organic matter in water according to claim 1 is characterized in that: The first polarity classification channel comprises a second multi-channel selective control valve (7), a second injection pump (8), a first polarity classification unit (9) and a third multi-channel selective control valve (10) which are connected in sequence; an end of the second multi-channel selective control valve (7) away from the second injection pump (8) is connected to the first multi-channel selective control valve (5); an end of the third multi-channel selective control valve (10) away from the first polarity classification unit (9) is connected to the detector (28); and the second multi-channel selective control valve (7) is connected to a first solvent bottle (22) and a third solvent bottle (24) which are arranged outside the housing (1).

4. The automatic classification and analysis equipment for organic matter in water according to claim 1, characterized in that: The second polarity classification channel comprises a fourth multi-channel selective control valve (11), a third injection pump (12), a second polarity classification unit (13) and a fifth multi-channel selective control valve (14) which are connected in sequence; an end of the fourth multi-channel selective control valve (11) away from the third injection pump (12) is connected to the first multi-channel selective control valve (5); an end of the fifth multi-channel selective control valve (14) away from the second polarity classification unit (13) is connected to the detector (28); and the fourth multi-channel selective control valve (11) is connected to a second solvent bottle (23) and a third solvent bottle (24) which are arranged outside the housing (1).

5. The automatic classification and analysis equipment for organic matter in water according to claim 1 is characterized in that: The third polarity classification channel comprises a first online pH adjustment device (15), a second filter (16), a second online pH adjustment device (17), a sixth multi-channel selective control valve (18), a fourth injection pump (19), a third polarity classification unit (20) and a seventh multi-channel selective control valve (21) which are connected in sequence. The end of the first online pH adjustment device (15) away from the second filter (16) is connected to the first multi-channel selective control valve (5), the end of the seventh multi-channel selective control valve (21) away from the third polarity classification unit (20) is connected to the detector (28), the first online pH adjustment device (15) is connected to a fourth solvent bottle (25) arranged outside the housing (1), the second online pH adjustment device (17) is connected to a fifth solvent bottle (26) arranged outside the housing (1), and the sixth multi-channel selective control valve (18) is connected to a second solvent bottle (23), a third solvent bottle (24) and a sixth solvent bottle (27) arranged outside the housing (1).

6. The automatic classification and analysis equipment for organic matter in water according to claim 3, characterized in that: The first polarity classification unit (9) is a strong anion exchange column.

7. The automatic classification and analysis equipment for organic matter in water according to claim 6, characterized in that: The first polarity classification unit (9) is a SAX column or a DEA column.

8. The automatic classification and analysis equipment for organic matter in water according to claim 7, characterized in that: The first polarity classification unit (9) is a SAX column.

9. The automatic classification and analysis equipment for organic matter in water according to claim 7, characterized in that: The first polarity classification unit (9) is a solid phase extraction column or a packed filter column.

10. The automatic classification and analysis equipment for organic matter in water according to claim 4, characterized in that: The second polarity classification unit (13) is a C18 column or a C8 column.

11. The automatic classification and analysis equipment for organic matter in water according to claim 10, characterized in that: The second polarity classification unit (13) is a C18 column.

12. The automatic classification and analysis equipment for organic matter in water according to claim 11, characterized in that: The second polarity classification unit (13) is a solid phase extraction column or a packed filter column.

13. The automatic classification and analysis equipment for organic matter in water according to claim 5, characterized in that: The third polarity classification unit (20) is a strong cation exchange column.

14. The automatic classification and analysis equipment for organic matter in water according to claim 13, characterized in that: The third polarity classification unit (20) is an SCX column or a PRS column.

15. The automatic classification and analysis equipment for organic matter in water according to claim 14, characterized in that: The third polarity classification unit (20) is an SCX column.

16. The automatic classification and analysis equipment for organic matter in water according to claim 15, characterized in that: The third polar classification unit (20) is a solid phase extraction column or a packed filter column.

17. The automated classification and analysis equipment for organic matter in water according to any one of claims 1 to 16, characterized in that: The detector (28) includes any one or more of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer, and a total nitrogen analyzer.

18. The automatic classification and analysis equipment for organic matter in water according to claim 17, characterized in that: When the detector (28) includes multiple types of an ultraviolet-visible spectrophotometer, a total organic carbon analyzer, and a total nitrogen analyzer, an eighth multi-channel selection control valve is provided between the polarity classification channel and the detector (28).

19. The automatic classification and analysis equipment for organic matter in water according to any one of claims 1 to 16, characterized in that: The device further comprises a sample bottle (2) and a waste liquid collection device (29) arranged outside the housing (1); The sample bottle (2) is connected to the first multi-channel selective control valve (5), and a peristaltic pump (3) and a first filter (4) are sequentially arranged inside the housing (1) between the sample bottle (2) and the first multi-channel selective control valve (5); The waste liquid collection device (29) is respectively connected to the background channel and one end of the polarity classification channel close to the detector (28) and the detector (28); A first injection pump (6) is provided on the background channel.

20. The use of the automatic classification and analysis equipment for organic matter in water according to any one of claims 1 to 19 in analyzing the composition and content of soluble organic matter in water, comprising separating polar components and non-polar components, positively charged components and negatively charged components of organic matter in water, and separately determining the total amount of organic matter in each component.

21. The use according to claim 20, characterized in that When used to analyze the composition and content of nitrogen-containing dissolved organic matter in water, the polarity classification channel includes a second polarity classification channel and a third polarity classification channel; When used to analyze the composition and content of carbon-containing dissolved organic matter in water, the polarity classification channel includes a first polarity classification channel, a second polarity classification channel and a third polarity classification channel.

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