A method and system for real-time monitoring, early warning and precise quantification of odor substances in water bodies

Abstract

The present invention discloses a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies, which are used for real-time online monitoring and early warning of odorous substances in surface water, drinking water sources, raw water and drinking water, and realizes precise quantitative analysis of odorous substances. It solves the difficult problems of real-time monitoring, early warning and precise quantification of odorous substances in water bodies, especially odorous substances in water sources and raw water, greatly improves the timeliness of odorous substance detection in water bodies, and has important significance and promotion and application value for water quality monitoring and early warning of water sources and comprehensive protection of drinking water safety.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water. Background Art

[0002] Odor is an important sensory indicator of water quality and a crucial basis for judging water quality. Research on water odor has been a hot topic in numerous research fields, including environmental science, lake ecology, and drinking water safety. Odor incidents in drinking water are occurring with increasing frequency, with widespread odor problems in drinking water across the Americas, Australia, Europe, Africa, and Asia. In my country, cities such as Beijing, Shanghai, Shenzhen, Guangzhou, Hangzhou, and Jingjiang have also reported odor-related issues, indicating that odor has become a major water quality issue affecting water supply.

[0003] The main causes of water odor problems are algal and chemical. Algal odor is mainly caused by the growth, reproduction, and metabolism of algae. The main earthy and musty odor in lake and reservoir water sources, of which 2-MIB is the main substance causing the earthy and musty odor in surface water sources. Open water sources such as rivers are easily affected by pollution, and the odor problem is more complicated. The chemical odor of water bodies caused by various chemicals is even more complex and diverse. Chemical odor substances are mainly caused by industrial wastewater discharge, chemical leaks, and the irrational use of pesticides and fertilizers. Industrial chemicals such as cyclic acetals such as 2-EDD and 2-EMD have low odor thresholds and can cause water bodies to have a noticeable odor at very low concentrations. When odor substance pollution occurs, timely and accurate quantification has always been a difficult problem for water quality monitoring and early warning. Traditional laboratory analysis has poor timeliness and cannot play a monitoring and early warning role.

[0004] Therefore, it is urgent to explore a real-time online monitoring, early warning and precise quantification system and method for odorous substances in water bodies, which is of great significance to solving the problem of odorous substance monitoring in the industry and ensuring the safety of drinking water source water quality. Summary of the Invention

[0005] In order to solve the problems raised in the above background technology, the present invention discloses a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies, which is used for real-time online monitoring and early warning of odorous substances in surface water, drinking water sources, raw water and drinking water, and realizes precise quantitative analysis of odorous substances.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention is to provide a method for real-time monitoring, early warning and precise quantification of odorous substances in water, comprising the following steps:

[0008] The water body is passed through a real-time sampling and monitoring device, which is connected to the air inlet of an electronic nose, and the electronic nose performs sensory monitoring of odor substances in the water body;

[0009] When the water body is contaminated by odorous substances and the monitoring warning threshold set by the electronic nose is triggered, the electronic nose sends a warning signal to the control system;

[0010] After receiving the warning signal, the control system sends an instruction to the analysis system, which samples the water and performs precise quantitative analysis.

[0011] After the test is completed, the sample test data file is automatically analyzed by the mass spectrometry data analysis quantitative software, and the detection quantitative data of the odorous substances are output.

[0012] In a preferred embodiment, the sampling and monitoring device includes a box body, and a mixed liquid chamber and an air chamber are sequentially provided inside the box body from bottom to top. A water inlet and an electronic nose air inlet are provided on the top of the box body, and the water inlet is connected to the water inlet pipe and passes into the bottom of the box body, thereby allowing water to enter the mixed liquid chamber; the electronic nose air inlet is connected to the air chamber for sensory monitoring of odorous substances in the water; an agitator is provided at the bottom of the box body for fully stirring the water body so that the odorous substances in the water body are fully dispersed from the water body into the air chamber; an analysis system sampling port and a retained sample sampling port are also provided on the right side of the box body, the analysis system sampling port is used to collect water samples for accurate quantification and analysis by the analysis system, and the retained sample sampling port is used to collect water samples for comparative analysis in the laboratory; the analysis system sampling port and the retained sample sampling port are synchronously configured with electrically controlled valves, which control the on and off of the fluid medium in the box body and adjust the flow rate of the fluid medium.

[0013] In a preferred embodiment, an air vent is further provided on the top of the sampling and monitoring device, and the air vent is used to balance the air pressure generated during the electronic nose suction monitoring.

[0014] In a more preferred embodiment, the diameter of the air holes is preferably 1 to 5 mm, more preferably 1 to 2 mm.

[0015] In a preferred embodiment, a U-shaped overflow pipe is further provided on the left side of the sampling and monitoring device. When the water fills the U-shaped overflow pipe, a liquid seal is formed to increase the air tightness of the air chamber.

[0016] In a preferred embodiment, the core component of the electronic nose is preferably a PEN3 electronic nose sensor.

[0017] In a preferred embodiment, the odorous substance is preferably one or more of dimethyl isoborneol, geosmin, 2-EMD, and 2-EDD.

[0018] In a preferred embodiment, the monitoring and early warning threshold of dimethyl isoborneol is preferably 8 to 10 ng / L.

[0019] In a preferred embodiment, the monitoring and early warning threshold of the geosmin is preferably 8 to 10 ng / L.

[0020] In a preferred embodiment, the monitoring and early warning threshold of the 2-EMD is preferably 8 to 10 ng / L.

[0021] In a preferred embodiment, the monitoring and early warning threshold of the 2-EDD is preferably 8 to 10 ng / L.

[0022] In a preferred embodiment, when the odorous substances in the water body trigger the monitoring warning threshold set by the electronic nose, the analysis system will sample from the analysis system sampling port in the sampling monitoring device and perform precise quantitative analysis.

[0023] In a preferred embodiment, when the odorous substances in the water body do not trigger the warning threshold set by the electronic nose, a timed sampling and precise analysis task can also be set for quantitative analysis of the background value of the odorous substances in the water body and daily monitoring.

[0024] In a preferred embodiment, the analysis system is preferably an online solid phase microextraction-gas chromatography tandem mass spectrometry analysis system.

[0025] In a preferred embodiment, the analysis system automatically analyzes and processes the sampled water based on online solid phase microextraction-gas chromatography tandem mass spectrometry to analyze the concentration values of odorous substances in the water.

[0026] In a preferred embodiment, the extraction temperature of the solid phase microextraction is preferably 50-60°C.

[0027] In a preferred embodiment, the oscillation rate in the solid phase microextraction is preferably 400-500 rpm.

[0028] In a preferred embodiment, the oscillation time in the solid phase microextraction is preferably 10 to 20 minutes.

[0029] In a preferred embodiment, the extraction time of the solid phase microextraction is preferably 25 to 30 minutes.

[0030] In a preferred embodiment, the decomposition temperature in the solid phase microextraction is preferably 200-230°C.

[0031] In a preferred embodiment, the solid phase microextraction decomposition time is preferably 3 to 4 minutes.

[0032] In a preferred embodiment, in the gas chromatography analysis, the injection port temperature is preferably 200-250°C.

[0033] In a preferred embodiment, in the gas chromatography analysis, the column oven temperature is preferably 40-45°C.

[0034] In a preferred embodiment, in the gas chromatography analysis, the injection method is preferably splitless injection.

[0035] In a preferred embodiment, in the gas chromatography analysis, the carrier gas flow rate is preferably constant.

[0036] In a more preferred embodiment, the carrier gas flow rate is preferably 1.0 to 2.0 mL / min.

[0037] More preferably, the carrier gas is helium.

[0038] The above contents of the present invention are applicable to the real-time monitoring, early warning and precise quantification of odorous substances in upstream surface water of water sources, important river and lake sections, water source water intakes, raw water and drinking water.

[0039] The second aspect of the present invention is to provide a system for real-time monitoring, early warning and precise quantification of odorous substances in water, comprising a real-time sampling and monitoring device, an electronic nose, an online gas chromatography-tandem mass spectrometry analysis system and a control system;

[0040] The real-time sampling and monitoring device is connected to an electronic nose for sensory monitoring of odorous substances in water. The electronic nose is used for monitoring and early warning of odorous substances in water. When odorous substances are contaminated in water and the monitoring and early warning threshold set by the electronic nose is triggered, the electronic nose sends an early warning signal to the control system. The control system is used to send instructions to the analysis system. The online gas chromatography-tandem mass spectrometry analysis system is used to sample water and conduct precise quantitative analysis and processing.

[0041] The real-time sampling and monitoring device includes a box body, wherein a mixed liquid chamber and an air chamber are sequentially arranged inside the box body from bottom to top; a water inlet, an electronic nose air inlet and an air vent are arranged on the top of the box body; the water inlet is connected to the water inlet pipe and leads to the bottom of the box body, thereby allowing water to enter the mixed liquid chamber; the electronic nose air inlet is connected to the air chamber for sensory monitoring of odorous substances in the water; the air vent is used to balance the air pressure generated by the electronic nose during air extraction monitoring; a stirrer is provided at the bottom of the box body for fully stirring the water body so that the odorous substances in the water body are fully dispersed from the water body into the air chamber; the The right side of the box is also provided with an analysis system sampling port and a retained sample sampling port. The analysis system sampling port is used to collect water samples for accurate quantification and analysis by the analysis system, and the retained sample sampling port is used to collect water samples for comparative analysis in the laboratory; the analysis system sampling port and the retained sample sampling port are synchronously configured with electric control valves, which control the on and off of the fluid medium in the box and adjust the flow rate of the fluid medium; a U-shaped overflow pipe is provided on the left side of the box, and when the water fills the U-shaped overflow pipe, a liquid seal is formed to increase the air tightness of the air chamber.

[0042] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0043] (1) The present invention discloses a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies, and designs a sampling device suitable for real-time online monitoring of odorous substances in water bodies by an electronic nose. Compared with other methods that use electronic noses to monitor odors intermittently, the present invention realizes real-time online and continuous monitoring of odorous substances in water bodies, thereby improving the sensitivity of electronic nose monitoring.

[0044] (2) The present invention discloses a method and system for real-time monitoring, early warning, and precise quantification of odorous substances in water, which achieves the two important functions of odorous substance monitoring, early warning, and precise quantification in water. This method solves the current problem that precise quantification of odorous substances in water requires laboratory professional technicians to perform detection and analysis, which is time-consuming and time-sensitive, making it difficult to obtain timely odorous substance concentration data when odorous substance contamination occurs.

[0045] (3) The present invention discloses a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water. By combining the early warning function of odorous substances of an electronic nose with an online gas chromatography-tandem mass spectrometry system, the method and system realize the monitoring, early warning and precise quantification of odorous substances in water for the first time.

[0046] (4) The present invention discloses a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies, which has broad application scenarios in monitoring, early warning and precise quantification of odorous substances in surface water upstream of water sources, important river and lake sections, and especially in water intakes of water sources, and provides important technical support for the comprehensive guarantee of raw water and drinking water quality safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0048] Figure 1 This is a schematic diagram of a system for real-time monitoring, early warning and precise quantification of odorous substances in water according to the present invention.

[0049] Figure 2 This is a schematic diagram of a real-time sampling and monitoring device in a system for real-time monitoring, early warning and precise quantification of odorous substances in water according to the present invention.

[0050] Figure 3 This is a sensitivity response diagram for real-time monitoring and analysis of 2-MIB odor substances in water according to Example 1 of the present invention (the horizontal axis is time, and the vertical axis is the electronic nose response value).

[0051] Figure 4 This is a sensitivity response diagram for real-time monitoring and analysis of geosmin in water according to Example 2 of the present invention (the horizontal axis is time, and the vertical axis is the electronic nose response value).

[0052] Figure 5 This is a sensitivity response diagram for real-time monitoring and analysis of cyclic acetal 2-EDD odorant in water according to Example 3 of the present invention (the horizontal axis is time, and the vertical axis is the electronic nose response value).

[0053] Figure 6 This is the 2-EMD quantitative standard curve in Example 4 of the present invention.

[0054] Figure 7 This is the 2-EDD quantitative standard curve in Example 4 of the present invention. DETAILED DESCRIPTION

[0055] The following describes the embodiments of the present invention using specific examples and accompanying drawings. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through other different specific examples, and the details in this specification may be modified and altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] The present invention relates to a method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies, and particularly relates to real-time monitoring, early warning and precise quantitative analysis of algae-derived odorous substances such as dimethyl isoborneol (2-MIB), earthy musty odorous substances such as geosmin (GSM), and cyclic acetals such as 2-ethyl-4-methyl-1,3-dioxolane (2-EMD) and 2-ethyl-5,5-dimethyl-1,3-dioxane (2-EDD). The method is suitable for real-time monitoring, early warning and precise quantification of odorous substances in surface water upstream of water sources, important river and lake sections, water intakes of water sources, raw water and drinking water.

[0057] See Figure 1 As shown, the present invention provides a method for real-time monitoring, early warning and precise quantification of odorous substances in water, comprising the following steps:

[0058] (1) Real-time online monitoring

[0059] The water body is passed through a real-time sampling and monitoring device, which is connected to the air inlet of an electronic nose, and the electronic nose performs sensory monitoring of odor substances in the water body;

[0060] (2) Triggering water quality warning

[0061] When the water body is contaminated by odorous substances and the monitoring warning threshold set by the electronic nose is triggered, the electronic nose sends a warning signal to the control system;

[0062] (3) Linked precise analysis system

[0063] After receiving the warning signal, the control system sends an instruction to the analysis system, which samples the water and performs precise quantitative analysis.

[0064] (4) Data processing and analysis

[0065] After the test is completed, the sample test data file is automatically analyzed by the mass spectrometry data analysis quantitative software, and the detection quantitative data of the odorous substances are output.

[0066] Specifically, the sampling and monitoring device includes a box body, and a mixed liquid chamber and an air chamber are sequentially arranged inside the box body from bottom to top. A water inlet, an electronic nose air inlet and an air vent are arranged on the top of the box body. The water inlet is connected to the water inlet pipe and passes into the bottom of the box body, so that the water is passed into the mixed liquid chamber; the electronic nose air inlet is connected to the air chamber for sensory monitoring of odorous substances in the water; the air vent is used to balance the air pressure generated by the electronic nose during air extraction monitoring, and the aperture of the air vent is preferably 1 to 5 mm, more preferably 1 to 2 mm; an agitator is provided at the bottom of the box body for fully stirring the water body so that the odorous substances in the water body are fully discharged from the water body. Dispersed into the air chamber; the right side of the box is also provided with an analysis system sampling port and a retained sample sampling port, the analysis system sampling port is used to collect water samples for accurate quantification and analysis by the analysis system, and the retained sample sampling port is used to collect water samples for comparative analysis in the laboratory; the analysis system sampling port and the retained sample sampling port are synchronously configured with electric control valves, which control the on and off of the fluid medium in the box and adjust the flow rate of the fluid medium; the left side of the sampling monitoring device is also provided with a U-shaped overflow pipe, and when the water body fills the U-shaped overflow pipe, a liquid seal is formed to increase the air tightness of the air chamber.

[0067] In addition, the present invention also provides a system for real-time monitoring, early warning and precise quantification of odorous substances in water, including a real-time sampling and monitoring device, an electronic nose, an online gas chromatography-tandem mass spectrometry analysis system and a control system;

[0068] Among them, the real-time sampling and monitoring device is connected to an electronic nose for sensory monitoring of odorous substances in water bodies; the electronic nose is used for monitoring and early warning of odorous substances in water bodies. When the water body is contaminated by odorous substances and triggers the monitoring and early warning threshold set by the electronic nose, the electronic nose sends an early warning signal to the control system; the control system is used to send instructions to the analysis system; the online gas chromatography-tandem mass spectrometry analysis system is used to sample the water body and accurately quantitatively analyze and process it.

[0069] The following four examples further illustrate the technical solution of this application:

[0070] Example 1:

[0071] In this embodiment, raw water from a water source is used as a water matrix. The raw water from the water source is introduced into the mixed liquid chamber of the sampling and monitoring device through the water inlet of the real-time sampling and monitoring device. A 2-MIB standard is added to the water body at a spiked concentration of 10 ng / L. The water body is fully stirred using a stirrer to allow the 2-MIB in the water body to be fully dispersed into the air chamber. The electronic nose performs monitoring simultaneously. When the monitoring and warning threshold set by the electronic nose is triggered, a signal is sent to the control system, which then sends an instruction to the real-time monitoring device to perform sampling, conduct real-time online monitoring and analysis, and automatically output the detection data. Figure 3It can be seen that the 2-MIB odorant with a concentration of 10 ng / L in water has high sensitivity and the instrument responds well.

[0072] Example 2:

[0073] In this embodiment, raw water from a water source is used as a water matrix. The raw water from the water source is introduced into the mixed liquid chamber of the sampling and monitoring device through the water inlet of the real-time sampling and monitoring device. A geosmin standard is added to the water body at a spiked concentration of 10 ng / L. The water body is fully stirred using a stirrer to allow the geosmin in the water body to fully dissipate into the gas chamber. The electronic nose performs monitoring simultaneously. When the monitoring and warning threshold set by the electronic nose is triggered, a signal is sent to the control system, which then sends an instruction to the real-time monitoring device to perform sampling, conduct real-time online monitoring and analysis, and automatically output the detection data. Figure 4 It can be seen that the sensitivity of the odorous substance geosmin at a concentration of 10 ng / L in water is high and the instrument responds well.

[0074] Example 3:

[0075] In this embodiment, raw water from a water source is used as a water matrix. The raw water from the water source is introduced into the mixed liquid chamber of the sampling and monitoring device through the water inlet of the real-time sampling and monitoring device. A cyclic acetal 2-EDD standard is added to the water body at a spiked concentration of 100 ng / L. The water body is fully stirred using a stirrer to allow the 2-EDD in the water body to fully diffuse into the air chamber. The electronic nose performs monitoring simultaneously. When the monitoring and warning threshold set by the electronic nose is triggered, a signal is sent to the control system, which then sends an instruction to the real-time monitoring device to perform sampling, conduct real-time online monitoring and analysis, and automatically output the detection data. Figure 5 It can be seen that the 2-EDD odorant with a concentration of 100 ng / L in water has high sensitivity and the instrument responds well.

[0076] The specific analysis system setting parameters are as follows:

[0077] Table 1 Solid phase microextraction conditions

[0078]

[0079] Table 2 Gas chromatography temperature program conditions

[0080]

[0081] Table 3 Mass spectrometry acquisition conditions

[0082]

[0083] Example 4:

[0084] In this example, real-time online monitoring and precise quantitative analysis of odor substances were carried out on the surface water of a river. The results showed that 2-EMD and 2-EDD were detected in four samples. The specific retention times and reference ion parameters are shown in Table 4, and the specific precise quantitative analysis results are shown in Table 5.

[0085] Table 4 Retention times and reference ion parameters of 2-EDD and 2-EMD

[0086]

[0087]

[0088] Table 5 Accurate quantitative concentrations of 2-EMD and 2-EDD in surface water (unit: ng / L)

[0089]

[0090] Also, see Figure 6 and Figure 7 As shown, a standard curve was drawn for the test results in the above embodiment (4), wherein the concentrations of the standard curves for 2-EDD and 2-EMD odor substances were 10.0 ng / L, 20.0 ng / L, 40.0 ng / L, 60.0 ng / L, and 100 ng / L. The standard curve was established with the concentration of the target compound in the standard series solution as the horizontal axis and the quantitative ion peak area of the target compound as the vertical axis. The established curve correlation coefficient R 2 ≥0.995, good linearity.

[0091] To sum up, the method and system for real-time monitoring, early warning and precise quantification of odorous substances in water bodies disclosed in the present invention solve the difficult problems of real-time monitoring, early warning and precise quantification of odorous substances in water bodies, especially odorous substances in water sources and raw water, greatly improves the timeliness of odorous substance detection in water bodies, and has important significance and promotion and application value for water quality monitoring and early warning of water sources and comprehensive protection of drinking water safety.

[0092] While the specific embodiments of the present invention have been described in detail above, these are merely exemplary and the present invention is not limited thereto. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, any equivalent changes and modifications made without departing from the spirit and scope of the present invention are intended to be encompassed within the scope of the present invention.

Claims

1. A method for real-time monitoring, early warning and precise quantification of odorous substances in water, characterized in that: The following steps are involved: The water body is passed through a real-time sampling and monitoring device, which is connected to the air inlet of an electronic nose, and the electronic nose performs sensory monitoring of odor substances in the water body; When the water body is contaminated by odorous substances and the monitoring warning threshold set by the electronic nose is triggered, the electronic nose sends a warning signal to the control system; After receiving the warning signal, the control system sends an instruction to the analysis system, which samples the water and performs precise quantitative analysis. After the test is completed, the sample test data file is automatically analyzed by the mass spectrometry data analysis and quantitative software, and the detection quantitative data of the odor substances are output; Among them, the real-time sampling and monitoring device includes a box body, and a mixed liquid chamber and an air chamber are provided in sequence from bottom to top inside the box body. A water inlet and an electronic nose air inlet are provided on the top of the box body, and the water inlet is connected to the water inlet pipe and passes into the bottom of the box body, thereby allowing the water to enter the mixed liquid chamber; the electronic nose air inlet is connected to the air chamber for sensory monitoring of odorous substances in the water; an agitator is provided at the bottom of the box body for fully stirring the water body so that the odorous substances in the water body are fully dispersed from the water body into the air chamber; an analysis system sampling port and a retained sample sampling port are also provided on the right side of the box body, the analysis system sampling port is used to collect water samples for accurate quantification and analysis by the analysis system, and the retained sample sampling port is used to collect water samples for comparative analysis in the laboratory; the analysis system sampling port and the retained sample sampling port are synchronously configured with electrically controlled valves, which control the on and off of the fluid medium in the box body and adjust the flow rate of the fluid medium.

2. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: The top of the real-time sampling monitoring device is also provided with an air vent, which is used to balance the air pressure generated during the electronic nose suction monitoring.

3. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 2, characterized in that: The aperture of the air vents in the real-time sampling and monitoring device is 1-5 mm.

4. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: A U-shaped overflow pipe is also provided on the left side of the real-time sampling and monitoring device. When the water fills the U-shaped overflow pipe, a liquid seal is formed to increase the air tightness of the air chamber.

5. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: The core component of the electronic nose is selected from the PEN3 type electronic nose sensor.

6. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: The odorous substance is one or more of dimethyl isoborneol, geosmin, 2-EMD, and 2-EDD; wherein the monitoring and early warning threshold range of dimethyl isoborneol, geosmin, 2-EMD, and 2-EDD is 8~10ng / L.

7. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: When odorous substances in the water body trigger the warning threshold set by the electronic nose, the odorous substance precise analysis system will sample from the sampling port of the analysis system in the real-time sampling monitoring device and perform precise quantitative analysis; when odorous substances in the water body do not trigger the warning threshold set by the electronic nose, a timed sampling and precise analysis task is set for the background value of odorous substances in the water body and the quantitative analysis of daily monitoring.

8. The method for real-time monitoring, early warning and precise quantification of odorous substances in water according to claim 1, characterized in that: The analysis system is a gas chromatography-tandem mass spectrometry analysis system.

9. A system for real-time monitoring, early warning, and precise quantification of odorous substances in water, for implementing the method for real-time monitoring, early warning, and precise quantification of odorous substances in water as claimed in any one of claims 1 to 8, characterized in that: The system comprises a real-time sampling and monitoring device, an electronic nose, an online gas chromatography-tandem mass spectrometry analysis system, and a control system; wherein the real-time sampling and monitoring device is connected to the electronic nose for sensory monitoring of odorous substances in water; the electronic nose is used for monitoring and early warning of odorous substances in water; when odorous substances contamination occurs in the water and the monitoring and early warning threshold set by the electronic nose is triggered, the electronic nose sends an early warning signal to the control system; the control system is used to send instructions to the analysis system; the online gas chromatography-tandem mass spectrometry analysis system is used to sample the water and accurately perform quantitative analysis and processing; Among them, the real-time sampling and monitoring device includes a box body, and a mixed liquid chamber and an air chamber are provided in sequence from bottom to top inside the box body. A water inlet and an electronic nose air inlet are provided on the top of the box body, and the water inlet is connected to the water inlet pipe and passes into the bottom of the box body, thereby allowing the water to enter the mixed liquid chamber; the electronic nose air inlet is connected to the air chamber for sensory monitoring of odorous substances in the water; an agitator is provided at the bottom of the box body for fully stirring the water body so that the odorous substances in the water body are fully dispersed from the water body into the air chamber; an analysis system sampling port and a retained sample sampling port are also provided on the right side of the box body, the analysis system sampling port is used to collect water samples for accurate quantification and analysis by the analysis system, and the retained sample sampling port is used to collect water samples for comparative analysis in the laboratory; the analysis system sampling port and the retained sample sampling port are synchronously configured with electrically controlled valves, which control the on and off of the fluid medium in the box body and adjust the flow rate of the fluid medium.

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