Multi-channel plane dot matrix light source photoelectric detection water quality analyzer

Abstract

The utility model relates to the technical field of biosensors, and discloses a multi-channel plane dot matrix light source photoelectric detection water quality analyzer which comprises a water quality analyzer main body, a containing groove is formed in the front end of the water quality analyzer main body, a cuvette holder used for storing cuvettes containing water quality samples is inserted into the containing groove, and the cuvette holder is connected with the water quality analyzer main body. Four sample detection ports are formed in the cuvette holder, so that four water quality samples can be detected at the same time, and the sample loading and detection efficiency is remarkably improved; through the arrangement of the shading plate capable of rotating by 180 degrees, the detection operation after sample loading is different from that of a traditional spiral shading sealing device, and the detection operation is more convenient and faster; the cuvette holder is used for loading samples in a pull-out manner, so that the positioning of the colorimetric samples and the quick loading are facilitated; each of the four sample detection ports corresponds to four dot matrix light sources, and different water quality indexes of the sample can be detected through the 16 dot matrix light sources, so that the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biosensors, in particular to a multi-channel planar dot matrix light source photoelectric detection water quality analyzer. Background Art

[0002] A biosensor is an instrument that detects biological substances by converting their concentration into an electrical signal. Photoelectric detection water quality analyzers are used to identify water samples collected on-site using a photoelectric colorimetric method and pre-treated with relevant reagents. This instrument enables quantitative, multi-channel detection of target content in samples, providing a new instrument for rapid on-site water quality testing.

[0003] The Lambert-Beer law, also known as Beer's law, Beer's law, or Bouguer-Lambert-Beer law, is a fundamental law of light absorption. It describes the relationship between the absorption of a wavelength of light by a substance and the concentration and thickness of the absorbing substance. It applies to all electromagnetic radiation and all absorbing substances, including gases, solids, liquids, molecules, atoms, and ions. The Beer-Lambert law is the quantitative basis for spectrophotometry, colorimetry, and photoelectric colorimetry. The amount of light absorbed is proportional to the number of molecules in the light path that absorb it.

[0004] The principle of use is to place the transmission sample (such as a cuvette or a cuvette) or the reflection sample (such as a dry chemical test strip or a colloidal gold test strip) facing the dot matrix light source or at a certain angle (reflection imaging and photographic detection). The microprocessor (MPU) controls the start of the light source that matches the test item, and analyzes the absorbance or photographic imaging results of the tested sample through the photosensitive signal detector and the photographic image processing circuit to obtain the test result of the tested sample.

[0005] After searching, the patent with application number CN202010860542.1 discloses a water quality analyzer and a water quality detection method, which belongs to the field of water quality photoelectric colorimetric detection technology. Its technical solution is: a water quality analyzer, characterized in that it includes a shell, a detection module is provided in the shell, and the detection module includes a mounting seat, the upper and lower end faces of the mounting seat are provided with an even number of grooves, and each of the grooves is sequentially provided with a light source, a filter and a photoelectric sensor, and a through hole is provided on the mounting seat. The light source is provided on one side of the through hole, and the filter and the photoelectric sensor are provided on the other side of the through hole. Two adjacent grooves constitute a group, and the two light sources in each group are not on the same side, and the angle between the two light sources in each group is an obtuse angle. The beneficial effects of this invention are: multiple parameter detection can be performed on a water sample, and there is no interference or very little interference between the light rays, and the detection accuracy is high.

[0006] The current photoelectric detection water quality analyzer has few sample detection ports, which is not convenient for simultaneously detecting the water quality indicators of multiple water samples, reducing the detection efficiency. In addition, the current water quality sample loading method is relatively traditional, which is not convenient for positioning contrasting color samples and realizing rapid sampling. Therefore, we need to propose a multi-channel planar dot matrix light source photoelectric detection water quality analyzer. Utility Model Content

[0007] The purpose of the utility model is to provide a multi-channel planar dot matrix light source photoelectric detection water quality analyzer. Four sample detection ports are provided on the colorimetric cup holder, which can detect four water quality samples at the same time, significantly improving the sampling and detection efficiency. By providing a 180° rotatable light shielding plate, the detection operation after sampling is different from the traditional spiral light shielding sealing device, which is more convenient and quick. The colorimetric cup holder adopts a pull-out sample loading method, which is convenient for positioning the colorimetric sample and realizing rapid sampling. Each of the four sample detection ports corresponds to four dot matrix light sources. By providing 16 dot matrix light sources, different water quality indicators of the sample can be detected, thereby improving the detection efficiency and solving the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-channel planar dot matrix light source photoelectric detection water quality analyzer, comprising a water quality analyzer body, a receiving slot being provided at the front end of the water quality analyzer body, a cuvette holder for storing a cuvette containing a water quality sample being inserted into the receiving slot, a plurality of circular mounting slots being provided at the top of the cuvette holder, and a through slot communicating with the mounting slots being provided on the side of the cuvette holder;

[0009] Two non-adjacent inner walls of the containing tank are respectively installed with a light detector plate and a light source plate. A light shielding plate for covering the containing tank is also rotatably installed on the main body of the water quality analyzer.

[0010] Preferably, four mounting slots for placing cuvettes are arranged at equal intervals on the cuvette holder, a clamping block is connected to the bottom of the cuvette holder, a clamping slot is provided at the bottom of the accommodating slot, and the clamping block is slidably inserted into the clamping slot.

[0011] Preferably, the photodetector board and the light source board are both provided with eight dot matrix light sources, and the cuvette inside each mounting slot is respectively provided corresponding to the two dot matrix light sources on the photodetector board and the two dot matrix light sources on the light source board.

[0012] Preferably, the shading plate is an L-shaped shading plate, and the shading plate can rotate 180°.

[0013] Preferably, the surface of the water quality analyzer body is further provided with a key control unit and a display screen for displaying the test results of water quality samples.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The cuvette holder of this utility model is equipped with four sample detection ports, which can detect four water samples at the same time, significantly improving the efficiency of sample loading and detection. The 180° rotatable light shielding plate makes the detection operation after sample loading different from the traditional spiral light shielding sealing device, which is more convenient and quick.

[0016] 2. The colorimetric cup holder of the utility model is a pull-out type for sample loading, which is convenient for positioning the colorimetric sample and realizing rapid sample loading; each of the four sample detection ports corresponds to four dot matrix light sources. By setting up 16 dot matrix light sources, different water quality indicators of the sample can be detected, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a structural diagram of the light source board of the utility model;

[0019] Figure 3 This is a structural diagram of the light detector board of the present utility model.

[0020] In the figure: 1. Water quality analyzer body; 2. Key control unit; 3. Display screen; 4. Receiving slot; 5. Shading plate; 6. Light detector board; 7. Card slot; 8. Colorimetric cup holder; 81. Mounting slot; 82. Through slot; 83. Card block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-3 The utility model provides a technical solution: a multi-channel planar dot matrix light source photoelectric detection water quality analyzer, comprising a water quality analyzer body 1, a front end of the water quality analyzer body 1 is provided with a receiving slot 4, a cuvette holder 8 for storing a cuvette containing a water quality sample is inserted into the receiving slot 4, a top of the cuvette holder 8 is provided with a plurality of circular mounting slots 81, and a side of the cuvette holder 8 is provided with a through slot 82 connected to the mounting slot 81;

[0024] The model of the water quality analyzer main body 1 is F20 handheld water quality detector.

[0025] The two non-adjacent inner walls of the accommodating groove 4 are respectively installed with a light detector plate 6 and a light source plate. The light detector plate 6 is set as a dot matrix integrated light detector plate, and the light source plate is set as a dot matrix integrated light source plate. The water quality analyzer body 1 is also rotatably installed with a light shielding plate 5 for covering the accommodating groove 4. The rotating installation of the light shielding plate 5 is different from the traditional spiral light shielding sealing device, which is more convenient and quick.

[0026] Four mounting slots 81 for placing cuvettes are arranged at equal intervals on the cuvette holder 8. A clamping block 83 is connected to the bottom of the cuvette holder 8. A clamping slot 7 is provided at the bottom of the accommodating slot 4. The clamping block 83 is slidably inserted into the inside of the clamping slot 7. That is, the pull-out design of the cuvette holder 8 facilitates the positioning of the colorimetric sample and enables rapid sampling.

[0027] like Figure 2 and Figure 3 As shown, the photodetector board 6 and the light source board are both provided with eight dot matrix light sources, and the cuvette inside each mounting slot 81 is respectively provided corresponding to the two dot matrix light sources on the photodetector board 6 and the two dot matrix light sources on the light source board.

[0028] The light shielding plate 5 is an L-shaped light shielding plate, and the light shielding plate 5 can rotate 180 degrees.

[0029] The surface of the water quality analyzer body 1 is also provided with a key control unit 2 and a display screen 3 for displaying the water quality sample test results. The key control unit 2 includes numeric keys, a power key, an item key, a zero key, a measurement key, a send key, etc.

[0030] The general operating procedures of this instrument for water quality testing are as follows:

[0031] Take out a reagent tube for colorimetric detection from the water detection box;

[0032] 2. Use metal tweezers to crush all capillary reagent tubes in the reagent tube;

[0033] 3. Turn the reagent tube upside down and cut the bottom of the reagent tube;

[0034] 4. Pour all the reagent debris in the reagent tube into the colorimetric cup with the water sample to be tested and let it stand for about 1 minute to develop color;

[0035] 5. Place the instrument flat and place all cuvette samples in order into the cuvette rack 8;

[0036] 6. Open the rotating light shield 5 and insert the cuvette holder 8 with the sample into the bottom slot 7 until it stops;

[0037] 7. Cover the rotating light shield 5, press the item key to select the test index; press the measurement key to measure the water sample test results; press the send key to save or send the test information.

[0038] When testing water quality, the ammonia nitrogen content in the water sample is tested, including the following processes:

[0039] 1.2 Preparation of color developing reagent

[0040] This method uses sodium dichloroisocyanurate, sodium nitrosoferricyanide, and sodium hydroxide as colorimetric reagents; several portions of the reagents are weighed in a mass ratio of 40 mg:40 mg:40 mg, and each portion is used to test a water sample.

[0041] 1.3 Packaging of colorimetric reagents for long-term storage

[0042] Place the reagents in the above proportions into three brown capillary glass tubes with appropriate inner diameters; then seal both ends of the capillary glass tubes; then place the capillary reagent tube into a stoppered plastic tube with an inner diameter of about 5mm to form a color developer tube, which can be stored and used for a long time.

[0043] 1.4 Test methods

[0044] 1.4.1 On-site usage

[0045] When testing ammonia nitrogen in a water sample, take out a colorimetric reagent test tube, crush the capillary reagent tube to react with the water sample to develop color, and then use the F20 handheld water quality detector to perform colorimetric determination. The ammonia nitrogen concentration result of the water sample can be obtained within 10 minutes.

[0046] 1.4.2 Drawing the working curve

[0047] Use ammonium chloride to prepare ammonia nitrogen standard solutions with concentrations of 0, 0.05, 0.10, 0.20, 0.40, and 0.50 mg / L respectively.

[0048] Take a clean ordinary 1cm cuvette and take 3ml of water sample of the above 6 concentrations of standard solution respectively.

[0049] Take one tube of the prepared color developer, crush the capillary glass tube containing the reagent (be careful that broken glass fragments can easily hurt your hands), pour the exposed reagent and the fragments into the water sample cuvette and shake well to allow the water sample to fully react and develop color.

[0050] Turn on the power button of the F20 handheld water quality detector, use pure water plus color developer as a reference, and measure the absorbance value.

[0051] A working curve is drawn according to different water sample concentrations and the corresponding absorbance values measured.

[0052] 1.4.3 Sample testing

[0053] According to the above steps, use pure water as a reference to determine the sample absorbance value, or after the working curve is written into the memory EPROM of the F20 handheld water quality detector, the ammonia nitrogen content of the tested sample is directly displayed after calculation by the instrument processor.

[0054] Results: The working (regression analysis) curve of the instrument for ammonia nitrogen detection in water is y=0.00273+0.2286x, where y is the absorbance value (unit: abs) of a certain concentration of ammonia nitrogen sample measured by the instrument, and x is the concentration value of the ammonia nitrogen sample; the effective detection range of ammonia nitrogen content in water is: 0.0~2.0mg / L.

[0055] Note: This instrument has 7 built-in important test item curves that comply with the "National Military Drinking Water Hygiene Inspection Standards" and meet general environmental water quality inspection requirements.

[0056] Instrument item number P8-11 displays the absorbance of water samples (with four different wavelengths), making it equivalent to a simple photoelectric colorimeter in some cases. The reagents used in the measurement are capillary-encapsulated aqueous solutions or powders, allowing for long-term storage and preservation. The reagent volume ensures multiple uses in testing.

[0057] 1. Rinse the cuvette with pure water before each on-site use or before retrieving it. Whenever the cuvette is inserted into the measuring tank, the light-transmitting surface must be clean. If there are fingerprints, oil stains, or dust, wipe it completely with lens paper before insertion.

[0058] 2. Ensure that the sample does not contain large debris such as stone chips, otherwise it will interfere with the measurement.

[0059] 3. When zeroing a blank sample, the cuvette cover must be securely closed to prevent external contamination or stray light interference. To ensure accurate and stable zero point, press the zero key twice.

[0060] 4. Sample measurement should be performed as soon as possible after each zero adjustment, and the time gap between zero adjustment and measurement should be shortened as much as possible.

[0061] 5. Do not leave the test sample for too long after adding the reagent, otherwise it will affect the accuracy.

[0062] 6. The reaction time required for each test reagent is different. Please refer to the corresponding instructions in the manual for details.

[0063] 7. Multiple readings can be taken in a set of measurements, but zero adjustment must be performed for each measurement, and the zeroing sample should be consistent. Clean the glass immediately after each measurement to prevent corrosion.

[0064] 8. Keep the instrument flat when in use. Shaking the instrument can create bubbles in the test sample, increasing the reading. Remove bubbles by flicking the cuvette with your fingertips or by tilting it slightly.

[0065] Example 2

[0066] The same points as the above embodiment will not be repeated here, except that:

[0067] When testing water quality, the hexavalent chromium content in water samples is tested, including the following process:

[0068] 1.2 Preparation of color developing reagent

[0069] This method uses a diphenylcarbazide-hydroxylamine hydrochloride colorimetric system. The reagent is weighed in several portions in a mass ratio of 30 mg:20 mg, and each portion is used to test a water sample.

[0070] 1.3 Packaging of colorimetric reagents for long-term storage

[0071] Place the reagents in the above proportions into three brown capillary glass tubes with appropriate inner diameters; then seal both ends of the capillary glass tubes; then place the capillary reagent tube into a stoppered plastic tube with an inner diameter of about 5mm to form a color developer tube, which can be stored and used for a long time.

[0072] 1.4 Test methods

[0073] 1.4.1 On-site usage

[0074] When testing hexavalent chromium water samples, take out a colorimetric reagent test tube, crush the capillary reagent tube to react with the water sample to develop color, and then use the F20 handheld water quality detector to perform colorimetric determination. The ammonia nitrogen concentration result of the water sample can be obtained within 10 minutes.

[0075] 1.4.2 Drawing the working curve

[0076] Use analytically pure potassium chromate to prepare hexavalent chromium standard solutions with concentrations of 0, 0.05, 0.10, 0.20, 0.40, and 1.0 mg / L.

[0077] Take a clean ordinary 1cm cuvette and take 3ml of water sample of the above 6 concentrations of standard solution respectively.

[0078] Take one tube of the prepared color developer, crush the capillary glass tube containing the reagent (be careful that broken glass fragments can easily hurt your hands), pour the exposed reagent and the fragments into the water sample cuvette and shake well to allow the water sample to fully react and develop color.

[0079] Turn on the power button of the F20 handheld water quality detector, use pure water plus color developer as a reference, and measure the absorbance value.

[0080] A working curve is drawn according to different water sample concentrations and the corresponding absorbance values measured.

[0081] 1.4.3 Sample testing

[0082] Follow the above steps to measure the sample absorbance value with pure water as reference, or wait for the working curve to be written into the memory EPROM of the F20 handheld water quality detector, and then directly display the hexavalent chromium content of the tested sample after calculation by the instrument processor.

[0083] Results: The working (regression analysis) curve of the instrument for hexavalent chromium in water is y=0.0024+0.386x, where y is the absorbance value (abs) of a hexavalent chromium sample at a certain concentration measured by the instrument, and x is the concentration of the hexavalent chromium sample. The effective detection range of hexavalent chromium content in water is 0.0-1.0 mg / L.

[0084] Example 3

[0085] The same points as the above embodiment will not be repeated here, except that:

[0086] When testing water quality, the total iron content in the water sample is tested, including the following process:

[0087] 1.2 Preparation of color developing reagent

[0088] This method uses the aa bipyridine colorimetric system. The reagent is weighed in several portions at a mass ratio of 40 mg, and each portion can be used to detect one water sample.

[0089] 1.3 Packaging of colorimetric reagents for long-term storage

[0090] Place the reagents in the above proportions into three brown capillary glass tubes with appropriate inner diameters; then seal both ends of the capillary glass tubes; then place the capillary reagent tube into a stoppered plastic tube with an inner diameter of about 5mm to form a color developer tube, which can be stored and used for a long time.

[0091] 1.4 Test methods

[0092] 1.4.1 On-site usage

[0093] When testing a water sample for total iron, take out a colorimetric test tube, crush the capillary reagent tube to react with the water sample to develop color, and then use the F20 handheld water quality detector for colorimetric determination. The ammonia nitrogen concentration result of the water sample can be obtained within 10 minutes.

[0094] 1.4.2 Drawing the working curve

[0095] Use analytically pure ferric chloride to prepare total iron standard solutions with concentrations of 0, 0.05, 0.10, 0.50, 1.00, and 2.00 mg / L, respectively.

[0096] Take a clean ordinary 1cm cuvette and take 3ml of water sample of the above 6 concentrations of standard solution respectively.

[0097] Take one tube of the prepared color developer, crush the capillary glass tube containing the reagent (be careful that broken glass fragments can easily hurt your hands), pour the exposed reagent and the fragments into the water sample cuvette and shake well to allow the water sample to fully react and develop color.

[0098] Turn on the power button of the F20 handheld water quality detector, use pure water plus color developer as a reference, and measure the absorbance value.

[0099] A working curve is drawn according to different water sample concentrations and the corresponding absorbance values measured.

[0100] 1.4.3 Sample testing

[0101] Follow the above steps to measure the sample absorbance value with pure water as reference, or wait for the working curve to be written into the memory EPROM of the F20 handheld water quality tester, and then directly display the total iron content of the tested sample after calculation by the instrument processor.

[0102] Results: The instrument's detection working (regression analysis) curve for total iron in water is y=0.0015+0.237x, where y is the absorbance value (abs) of a certain concentration of ammonia nitrogen sample measured by the instrument, and x is the total iron sample concentration value; the effective detection range for total iron content in water is: 0.1~3.0mg / L.

[0103] Example 4

[0104] The same points as the above embodiment will not be repeated here, except that:

[0105] When testing water quality, the nitrite nitrogen content in the water sample is tested, including the following process:

[0106] 1.2 Preparation of color developing reagent

[0107] This method uses the sulfonamide-phosphoric acid-a-naphthylamine colorimetric system. The reagent is weighed in several portions in the mass ratio of 50 mg:30 mg:40 mg, and each portion can be used to detect one water sample.

[0108] 1.3 Packaging of colorimetric reagents for long-term storage

[0109] Place the reagents in the above proportions into three brown capillary glass tubes with appropriate inner diameters; then seal both ends of the capillary glass tubes; then place the capillary reagent tube into a stoppered plastic tube with an inner diameter of about 5mm to form a color developer tube, which can be stored and used for a long time.

[0110] 1.4 Test methods

[0111] 1.4.1 How to use water samples for on-site testing

[0112] When testing nitrite nitrogen in water samples, take out a colorimetric reagent test tube, crush the capillary reagent tube to react with the water sample to develop color, and then use the F20 handheld water quality tester for colorimetric determination. The ammonia nitrogen concentration result of the water sample can be obtained within 10 minutes.

[0113] 1.4.2 Drawing the working curve

[0114] Analytical grade sodium nitrite was used to prepare standard nitrite nitrogen solutions with concentrations of 0, 0.01, 0.10, 0.20, 0.50, and 1.00 mg / L.

[0115] Take a clean ordinary 1cm cuvette and take 3ml of water sample of the above 6 concentrations of standard solution respectively.

[0116] Take one tube of the prepared color developer, crush the capillary glass tube containing the reagent (be careful that broken glass fragments can easily hurt your hands), pour the exposed reagent and the fragments into the water sample cuvette and shake well to allow the water sample to fully react and develop color.

[0117] Turn on the power button of the F20 handheld water quality detector, use pure water plus color developer as a reference, and measure the absorbance value.

[0118] A working curve is drawn according to different water sample concentrations and the corresponding absorbance values measured.

[0119] 1.4.3 Sample testing

[0120] According to the above steps, use pure water as a reference to determine the sample absorbance value, or after the working curve is written into the memory EPROM of the F20 handheld water quality tester, the instrument processor will calculate and directly display the nitrite nitrogen content of the tested sample.

[0121] Results: The working (regression analysis) curve of the instrument for nitrite nitrogen detection in water is y=0.00578+1.287x, where y is the absorbance value (unit: abs) of a certain concentration of nitrite nitrogen sample measured by the instrument, and x is the concentration value of the nitrite nitrogen sample; the effective detection range of nitrite nitrogen content in water is: 0.01~1.0 mg / L.

[0122] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel planar dot matrix light source photoelectric detection water quality analyzer, comprising a water quality analyzer body (1), characterized in that: The front end of the water quality analyzer body (1) is provided with a receiving groove (4), the interior of the receiving groove (4) is plugged with a cuvette holder (8) for storing a cuvette containing a water quality sample, the top of the cuvette holder (8) is provided with a plurality of circular mounting grooves (81), and the side of the cuvette holder (8) is provided with a through groove (82) communicating with the mounting groove (81); Two non-adjacent inner walls of the receiving tank (4) are respectively mounted with a light detector plate (6) and a light source plate. A light shielding plate (5) for covering the receiving tank (4) is also rotatably mounted on the water quality analyzer body (1).

2. The multi-channel planar dot matrix light source photoelectric detection water quality analyzer according to claim 1, characterized in that: Four mounting slots (81) for placing cuvettes are arranged at equal intervals on the cuvette holder (8), a clamping block (83) is connected to the bottom of the cuvette holder (8), a clamping slot (7) is provided at the bottom of the accommodating slot (4), and the clamping block (83) is slidably inserted into the inside of the clamping slot (7).

3. The multi-channel planar dot matrix light source photoelectric detection water quality analyzer according to claim 1, characterized in that: Eight dot matrix light sources are provided on both the light detector plate (6) and the light source plate, and the cuvette inside each mounting slot (81) is respectively provided corresponding to the two dot matrix light sources on the light detector plate (6) and the two dot matrix light sources on the light source plate.

4. The multi-channel planar dot matrix light source photoelectric detection water quality analyzer according to claim 1, characterized in that: The shading plate (5) is configured as an L-shaped shading plate, and the shading plate (5) can rotate 180 degrees.

5. The multi-channel planar dot matrix light source photoelectric detection water quality analyzer according to claim 1, characterized in that: The surface of the water quality analyzer body (1) is also provided with a key control unit (2) and a display screen (3) for displaying water quality sample test results.

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