CN113624686A - Turbidity interference resistant water quality analysis device and method - Google Patents
Turbidity interference resistant water quality analysis device and method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000004458 analytical method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 83
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000012085 test solution Substances 0.000 claims description 38
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000008367 deionised water Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 13
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 42
- 238000002835 absorbance Methods 0.000 description 13
- 239000012488 sample solution Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 230000002572 peristaltic effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000010129 solution processing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 238000002798 spectrophotometry method Methods 0.000 description 1
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Abstract
The invention discloses a turbidity interference resistant water quality analysis device and a method in the technical field of water quality detection, wherein the device comprises a control unit, a sample feeding and liquid discharging unit, a detection unit, a turbidity resistance processing unit and a waste liquid processing unit; the detection unit comprises a reaction pool; the control unit is electrically connected with the sample injection and liquid discharge unit, the anti-turbidity processing unit and the detection unit; the anti-turbidity processing unit comprises a sampling tube, a filter, a power pump, a first switching valve, a quantifying tube and a second switching valve; the power pump and the filter are arranged between the first switching valve and the sampling tube; the sampling tube is connected with the reaction tank; one end of the quantitative pipe is connected with the first switching valve, and the other end of the quantitative pipe is connected with the second switching valve; the waste liquid treatment unit is connected with the first switching valve through a pipeline; the method is completed by applying the device. The invention can improve the anti-turbidity interference capability of the water quality analysis device and improve the accuracy and reliability of the analysis result.
Description
Technical Field
The invention relates to a turbidity interference resistant water quality analysis device and method, and belongs to the technical field of water quality detection.
Background
The water quality analysis is to determine the content of various chemical components in water by chemical and physical methods, and a water quality analyzer can realize the detection and analysis of water environment quality factors. At present, most of the existing automatic water quality analyzers in the market realize quantitative measurement of a water sample to be measured according to the Lambert beer law based on the principle of spectrophotometry. When the water sample to be detected is measured in a certain specific wavelength within a certain concentration range, the absorbance of the water sample to be detected is in direct proportion to the concentration of the substance to be detected.
However, in the actual working process, suspended particles such as silt in the water sample can generate scattering phenomenon in the light transmission process, so that the transmission light intensity is changed, namely, the absorbance is changed, and the measurement result has larger deviation.
Therefore, the technical problems to be solved by the technical personnel in the field are needed to effectively improve the turbidity interference resistance of the water quality analyzer and the reliability of the measurement result of the analyzer.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a turbidity interference resistant water quality analysis device and a turbidity interference resistant water quality analysis method, wherein the device can effectively improve the turbidity interference resistance of water quality analysis; the method uses the device to complete the detection and analysis of the water quality environmental factors, and can further reduce the interference of the turbidity of the water sample to be detected on the premise of ensuring the reliable result, thereby improving the accuracy and reliability of the water quality analysis result.
In order to achieve the above object, in one aspect, the present invention provides an anti-turbidity interference water quality analyzer, comprising a control unit, a sample and liquid discharge unit, a detection unit, an anti-turbidity treatment unit and a waste liquid treatment unit;
the detection unit comprises a reaction pool;
the control unit is electrically connected with the sample injection and liquid discharge unit, the anti-turbidity processing unit and the detection unit;
the anti-turbidity processing unit comprises a sampling tube, a filter, a power pump, a first switching valve, a quantifying tube and a second switching valve;
the power pump and the filter are arranged between the first switching valve and the sampling tube;
the sampling tube is connected with the reaction tank;
one end of the quantitative pipe is connected with the first switching valve, and the other end of the quantitative pipe is connected with the second switching valve;
and the waste liquid treatment unit pipeline is connected with the first switching valve.
Furthermore, the detection unit also comprises a light source, a transmission light receiver and a scattered light receiver which are arranged on the periphery of the reaction cell;
the included angle formed by the light source and the transmission light receiver is 180 degrees.
Further, the included angle formed by the light source and the scattered light receiver is 30-150 degrees.
Further, the detection unit further comprises a condenser lens; the condenser lens is arranged between the scattered light receiver and the reaction cell and/or between the transmitted light receiver and the reaction cell.
Further, the detection unit further comprises a high pressure resistant valve; the high pressure resistant valve is arranged on the reaction tank.
Furthermore, the reaction tank is made of glass.
Further, the filter pore size of the filter is 0.45-100 μm.
Furthermore, the sample feeding and liquid discharging unit comprises a selection valve, a metering component and a liquid flow sensor which are connected through pipelines;
and the liquid flow sensor is connected to the second switching valve through a pipeline.
Further, an air valve is further included, the air valve being connected to the reaction cell by a pipe.
In a second aspect, the present invention provides a turbidity disturbance-resistant water quality analyzing method using any one of the turbidity disturbance-resistant water quality analyzing apparatuses described above, comprising the steps of:
obtaining the scattered light intensity I of a water sample10And transmitted light intensity I11And compare I10/I11The size of the ratio I to the preset value and the scattered light intensity I10The intensity of the preset scattered light intensity value I';
adding a first reaction reagent into a water sample to perform a first chemical reaction to generate a first test solution;
when I is10/I11Greater than I and/or I10When the light intensity is larger than I', the first test solution is filtered and re-quantified by the anti-turbidity processing unit, and the transmitted light intensity I of the first test solution after anti-turbidity processing is detected21When I is10/I11Is less than I and I10When less than I', skipping the step;
adding a second reaction reagent into the first test solution to perform a second chemical reaction to generate a second test solution, and obtaining the transmission light intensity I of the second test solution31；
Exhausting the second test solution in the device, and cleaning the analysis device by deionized water to obtain the transmission light intensity I of the deionized water41；
The measurement result is calculated and the next measurement is prepared.
Compared with the prior art, the invention has the following beneficial effects:
by arranging the control unit and the anti-turbidity processing unit, the invention not only can filter and re-quantify the liquid to be detected, effectively improve the accuracy of the water quality detection result, but also can improve the automation degree of the device, avoid errors caused by artificial reasons and further improve the reliability of the device.
The turbidity interference resistant water quality analysis method provided by the invention is used for detecting and analyzing the environmental factors by using the device, and can further reduce the turbidity interference of the water sample to be detected on the premise of ensuring the reliable result, thereby improving the accuracy and reliability of the water quality analysis result.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an anti-turbidity interference water quality analyzer according to the present invention;
FIG. 2 is a top view of an embodiment of the detecting unit of the present invention;
FIG. 3 is a flow chart of an embodiment of the turbidity disturbance-resistant water quality analysis method according to the present invention.
In the figure: 110. a sample and liquid feeding and discharging unit; 111. a liquid flow sensor; 120. a reaction tank; 121. a light source; 122. a transmitted light receiver; 123. a scattered light receiver; 124. an air valve; 101. a sampling tube; 102. a filter; 103. a power pump; 104. a first switching valve; 105. a dosing tube; 106. a second switching valve; 130. a waste liquid treatment unit.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
In order to improve the turbidity-resistant interference capability of the water quality analyzer, referring to fig. 1, the embodiment provides a turbidity-resistant interference water quality analyzer, which includes a control unit, a sample-feeding and liquid-discharging unit 110, a detection unit, a turbidity-resistant processing unit, and a waste liquid processing unit 130; the detection unit includes a reaction cell 120; the control unit is electrically connected with the sample injection and liquid discharge unit, the anti-turbidity processing unit and the detection unit; the anti-turbidity processing unit comprises a sampling tube 101, a filter 102, a power pump 103, a first switching valve 104, a quantitative tube 105 and a second switching valve 106; the power pump 103 and the filter 102 are arranged between the switching valve I104 and the sampling tube 101; the sampling tube 101 is connected with the reaction tank 120; one end of the quantitative pipe 105 is connected with the first switching valve 104, and the other end is connected with the second switching valve 106; the waste liquid treatment unit 130 is connected with the first switching valve 104 through a pipeline.
In application, the power pump 103 is a peristaltic pump, and the peristaltic pump can rotate clockwise or counterclockwise by switching: when the peristaltic pump rotates clockwise, the liquid in the device flows clockwise; when the peristaltic pump is rotated counterclockwise, the liquid in the device flows counterclockwise. But not limited to, those skilled in the art can substitute different kinds of power pumps according to actual situations, and the above functions can be realized.
In the application of the present embodiment, referring to fig. 1, both the first switching valve and the second switching valve at least include 3 valve ports; by switching the valve core, the obstruction and the flow path of the liquid in the control device are realized. The light source 121, the transmitted light receiver 122 and the scattered light receiver 123 are all disposed on the periphery of the middle lower portion of the reaction cell 120, and are used for detecting the transmitted light intensity and the scattered light intensity of the liquid in the reaction cell. But not limited to this, the person skilled in the art can set the detection unit at different positions according to the actual situation, and can better detect the absorption intensity of the liquid in the reaction cell.
According to the invention, the automation degree of the device is improved by arranging the control unit; through setting up anti turbidity processing unit, can filter and re-ration liquid to be measured, improve the degree of accuracy of water quality testing result effectively to improve the credibility of device.
According to the invention, the filter is arranged, so that large-particle substances in the liquid to be detected can be filtered, and the detection result is improved; through setting up diverter valve, dosing pipe and power pump, the liquid that awaits measuring after can quantitative filtration again avoids the multifactor variable phenomenon to improve the accuracy of testing result.
Example 2
In order to improve the reliability of the device, on the basis of embodiment 1, referring to fig. 1, the detection unit of this embodiment further includes a light source 121, a transmitted light receiver 122, and a scattered light receiver 123 disposed at the periphery of the reaction cell 120; the angle formed by the light source 121 and the transmitted light receiver 122 is 180 °. The angle formed by the light source 121 and the scattered light receiver 123 is 30-150 deg.. The detection unit further comprises a condensing lens; the condenser lens is disposed between the scattered light receiver 123 and the reaction cell 102 and/or between the transmitted light receiver 122 and the reaction cell 102. The detection unit also comprises a high pressure resistant valve; the high pressure resistant valves are installed on the reaction tank 102, but not limited thereto, and those skilled in the art can reasonably adjust the number and installation positions of the high pressure resistant valves according to actual conditions, and can better control the pressure of the reaction tank. The reaction tank 102 is made of glass and is provided with a heating resistor and a temperature sensor to realize temperature control. The filter aperture of the filter 102 is 0.45-100 μm, and those skilled in the art can reasonably select the filter aperture according to the actual situation of the water sample to be tested and limited tests. The sample feeding and draining unit 110 comprises a selection valve, a metering component and a liquid flow sensor 112 which are connected through pipelines; the liquid flow sensor 112 is connected to the second switching valve 106 through a pipeline. The device further comprises an air valve 107; an air valve 107 is plumbed to the reaction cell 102.
In this embodiment, when the chemical reaction in the reaction cell 120 requires high temperature and/or high pressure, the high pressure resistant valve may be closed to increase the pressure in the reaction cell, so as to meet the requirement of the reaction condition and complete the reaction.
The high-pressure-resistant valve is arranged, so that the high-pressure condition of the chemical reaction in the reaction tank can be met, and the chemical reaction in the reaction tank is promoted to be complete; the deviation of the detection and analysis result caused by incomplete reaction is reduced to the greatest extent, so that the accuracy of the detection and analysis result is improved, and the reliability of the device is improved.
Example 3
On the basis of embodiment 1 or 2, referring to fig. 3, this embodiment provides a water quality analysis method resistant to turbidity disturbance:
s1 opening the air valve 107 and switching the second switching valve 106 to the channel 1-3 by the control unit, the water sample enters the reaction cell 120 after being measured by the sample and liquid discharging unit 110, and the light source 121 is turned on to perform the scattering light intensity I10And transmitted light intensity I11Measuring and comparing I10/I11The size of the ratio I to the preset value and the scattered light intensity I10The intensity of the preset scattered light intensity value I';
s2, the air valve 107 is kept open, the first reaction reagent enters the reaction cell 120 after being metered by the sample injection and drainage unit 110, and a first chemical reaction occurs to generate a first test solution;
s3 if I10/I11Greater than I and scattered light intensity I10If the value is larger than I', the process goes to steps S31-S34 to perform the anti-turbidity process, otherwise, the process goes directly to step S4:
s31, the first switching valve 104 is switched to the 2-3 channel, the second switching valve 106 is switched to the 2-3 channel, the air valve 107 is opened, the power pump 103 is regulated and controlled to rotate clockwise, and the test solution enters the quantitative tube 105 after being filtered by the filter 102 through the sampling tube 101; when the liquid flow sensor 111 detects a liquid flow signal, the power pump 103 is turned off;
s32, the first switching valve 104 is switched to a channel 1-3, and the second switching valve 106 is switched to a channel 1-3, so that the test solution outside the dosing tube 105 in the device is discharged to the waste solution treatment unit 130 through the sample feeding and discharging unit 110 and the power pump 103;
s33, the first switching valve 104 is switched to a channel 2-3, the second switching valve 106 is switched to a channel 1-2, and the power pump is regulated and controlled to rotate clockwise, so that the test solution in the quantitative tube 105 enters the reaction tank 120;
s34 turning on the light source 121, measuring the transmitted light intensity I of the test solution21
S4, the second reaction reagent is measured by the sample injection and drainage unit 110 and then enters the reaction cell 120 to perform a second chemical reaction with the first test solution to generate a second test solution, and the transmission light intensity I of the second test solution is obtained31；
S5, discharging the two sample solution channels to the waste solution processing unit 130 through the sample feeding and draining unit 110, and switching the second switching valve 106 to the channel 1-3, so that the deionized water enters the reaction cell 120 through the sample feeding and draining unit 110, thereby cleaning the reaction cell 120;
s6, the first switching valve 104 is switched to the 2-3 channel, the second switching valve 106 is switched to the 1-2 channel, the power pump 103 is controlled to rotate anticlockwise, the anti-turbidity processing unit is back-flushed, if the anti-turbidity processing of the steps S31-S34 is not performed, the step is skipped, and the step S7 is directly performed;
s7 using the transmission light intensity I of the test solution after anti-turbidity treatment21As the background light intensity, the transmitted light intensity I of the second sample solution is used31And calculating the absorbance as the measured light intensity, substituting the absorbance into a standard curve arranged in the instrument to calculate the measurement result, draining the deionized water, and preparing for the next measurement.
The invention measures the transmission light intensity I of the test solution I and the test solution II after the turbidity resistance treatment21And I31And the absorbance is calculated, so that the interference of the turbidity of the water sample to be detected on the absorbance light intensity detection can be effectively reduced, and the accuracy of monitoring and analysis is improved.
Example 4
On the basis of embodiment 1 or 2, referring to fig. 3, this embodiment provides a water quality analysis method resistant to turbidity disturbance:
s1, the air valve 107 is opened by the control unit and the second switching valve 106 is switched to the channel 1-3, the water sample is metered by the sample and liquid discharging unit 110 and then enters the reaction cell 120,turning on the light source 121 to scatter the light intensity I10And transmitted light intensity I11Measuring and comparing I10/I11The size of the ratio I to the preset value and the scattered light intensity I10The intensity of the preset scattered light intensity value I';
s2, the air valve 107 is kept open, the first reaction reagent enters the reaction cell 120 after being metered by the sample injection unit 111, the air valve 107 and the high-pressure-resistant valve are closed, the temperature of the reaction cell is heated and controlled, a first chemical reaction occurs in the reaction cell 120, and after a first test solution is generated, the reaction cell is cooled to room temperature;
s3 if I10/I11Greater than I and scattered light intensity I10If the value is larger than I', the process goes to steps S31-S33 to perform the anti-turbidity process, otherwise, the process goes directly to step S4:
s31, the first switching valve 104 is switched to the 2-3 channel, the second switching valve 106 is switched to the 2-3 channel, the air valve 107 is opened, the power pump 103 is regulated and controlled to rotate clockwise, and the test solution enters the quantitative tube 105 after being filtered by the filter 102 through the sampling tube 101; when the liquid flow sensor 111 detects a liquid flow signal, the power pump 103 is turned off;
s32, the first switching valve 104 is switched to a channel 1-3, and the second switching valve 106 is switched to a channel 1-3, so that the test solution outside the dosing tube 105 in the device is discharged to the waste solution treatment unit 130 through the sample feeding and discharging unit 110 and the power pump 103;
s33, the first switching valve 104 is switched to a channel 2-3, the second switching valve 106 is switched to a channel 1-2, and the power pump is regulated and controlled to rotate clockwise, so that the test solution in the quantitative tube 105 enters the reaction tank 120;
s4, the second reaction reagent is measured by the sample injection and drainage unit 110 and then enters the reaction cell 120 to perform a second chemical reaction with the first test solution to generate a second test solution, and the transmission light intensity I of the second test solution is obtained31；
S5, discharging the two sample solution channels to the waste solution processing unit 130 through the sample feeding and draining unit 110, and switching the second switching valve 106 to the channel 1-3, so that the deionized water enters the reaction cell 120 through the sample feeding and draining unit 110, thereby cleaning the reaction cell 120;
s6, the first switching valve 104 is switched to the 2-3 channel, the second switching valve 106 is switched to the 1-2 channel, the power pump 103 is controlled to rotate anticlockwise, the anti-turbidity processing unit is back-flushed, if the anti-turbidity processing of the steps S31-S34 is not performed, the step is skipped, and the step S7 is directly performed;
s7, the second switching valve 106 is switched to the channel 1-3, deionized water in the device is discharged through the sample-feeding and liquid-discharging unit, and then new deionized water is injected into the reaction cell 120 again to detect the transmission light intensity I of the deionized water41。
S8 using the transmitted light intensity I of deionized water41As the background light intensity, the transmitted light intensity I of the second sample solution is used31Calculating absorbance as measured light intensity, and substituting the absorbance into a standard curve arranged in the instrument to calculate a measurement result; the deionized water was drained and ready for the next measurement.
The invention measures the transmission light intensity I of the deionized water and the anti-turbidity treatment test solution II41And I31And calculating the absorbance, thereby improving the accuracy of monitoring analysis.
Example 5
On the basis of embodiment 1 or 2, referring to fig. 3, this embodiment provides a water quality analysis method resistant to turbidity disturbance:
s1 opening the air valve 107 and switching the second switching valve 106 to the channel 1-3 by the control unit, the water sample enters the reaction cell 120 after being measured by the sample and liquid discharging unit 110, and the light source 121 is turned on to perform the scattering light intensity I10And transmitted light intensity I11Measuring and comparing I10/I11The size of the ratio I to the preset value and the scattered light intensity I10The intensity of the preset scattered light intensity value I';
s2, the air valve 107 is kept open, the first reaction reagent enters the reaction cell 120 after being metered by the sample injection unit 111, the air valve 107 is closed, the first chemical reaction occurs in the reaction cell 120, and the first test solution is generated;
s3 if I10/I11Is less than I and I10And if the turbidity value is less than I', the turbidity value of the water sample is lower, and the anti-turbidity treatment is not needed.
S4, the second reaction reagent is measured by the sample injection and drainage unit 110 and then enters the reaction cell 120 to perform a second chemical reaction with the first test solution to generate a second test solution, and the transmission light intensity I of the second test solution is obtained31；
S5, discharging the two sample solution channels to the waste solution processing unit 130 through the sample feeding and draining unit 110, and switching the second switching valve 106 to the channel 1-3, so that the deionized water enters the reaction cell 120 through the sample feeding and draining unit 110, thereby cleaning the reaction cell 120;
s6 calculating the transmitted light intensity I of water sample11As the background light intensity, the transmitted light intensity I of the second sample solution is used31Calculating absorbance as measured light intensity, and substituting the absorbance into a standard curve arranged in the instrument to calculate a measurement result; the deionized water was drained and ready for the next measurement.
In the application of the embodiment, the transmitted light intensity I of the stock solution passing through the water sample11And the second transmission light intensity I of the test solution without anti-turbidity treatment31And calculating the absorbance.
In conclusion, the turbidity interference resistant water quality analysis device can effectively improve the turbidity interference resistance of water quality analysis; the turbidity interference resistant water quality analysis method completes detection and analysis of the environmental factors by applying the device, and can further reduce the turbidity interference of the water sample to be detected on the premise of ensuring the reliable result, thereby improving the accuracy and reliability of the water quality analysis result.
The invention can adjust the reagent dosage and variety according to different detected environmental factors, and select stock solution or deionized water of the water sample to be detected as background absorbance to detect and analyze the absorption light intensity of the water sample to be detected, thereby improving the universality of the device and the method.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A water quality analysis device with turbidity interference resistance is characterized by comprising a control unit, a sample and liquid feeding and discharging unit, a detection unit, a turbidity resistance processing unit and a waste liquid processing unit (130);
the detection unit comprises a reaction cell (120);
the control unit is electrically connected with the sample injection and liquid discharge unit, the anti-turbidity processing unit and the detection unit;
the anti-turbidity processing unit comprises a sampling tube (101), a filter (102), a power pump (103), a first switching valve (104), a quantitative tube (105) and a second switching valve (106);
the power pump (103) and the filter (102) are arranged between the switching valve I (104) and the sampling pipe (101);
the sampling tube (101) is connected with the reaction tank (120);
one end of the quantitative pipe (105) is connected with a first switching valve (104), and the other end of the quantitative pipe is connected with a second switching valve (106);
the waste liquid treatment unit (130) is connected with the first switching valve (104) through a pipeline.
2. The turbidity-disturbance-resistant water quality analyzer according to claim 1, wherein the detection unit further comprises a light source (121), a transmitted light receiver (122) and a scattered light receiver (123) disposed at the periphery of the reaction cell (120);
the included angle formed by the light source (121) and the transmitted light receiver (122) is 180 degrees.
3. The turbidity disturbance-resistant water quality analyzer according to claim 2, wherein the angle formed by the light source (121) and the scattered light receiver (123) is 30 ° to 150 °.
4. The turbidity-disturbance-resistant water quality analyzer according to claim 2, wherein the detection unit further comprises a condenser lens; the condenser lens is arranged between the scattered light receiver (123) and the reaction cell (102) and/or between the transmitted light receiver (122) and the reaction cell (102).
5. The turbidity interference-resistant water quality analyzer according to claim 1, wherein the detection unit further comprises a high pressure-resistant valve; the high pressure resistant valve is arranged on the reaction tank (102).
6. The turbidity-interference-resistant water quality analyzer according to claim 1, wherein the reaction cell (102) is made of glass.
7. The turbidity-interference-resistant water quality analyzer according to claim 1, wherein the filter (102) has a filter pore size of 0.45 to 100 μm.
8. The turbidity-interference-resistant water quality analysis device according to claim 1, wherein the sample-feeding and liquid-discharging unit (110) comprises a selection valve, a metering component and a liquid flow sensor (112) which are connected by pipelines;
the liquid flow sensor (112) is connected to the second switching valve (106) through a pipeline.
9. The turbidity interference-resistant water quality analyzer according to claim 1, further comprising an air valve (107), wherein the air valve (107) is connected to the reaction cell (102) through a pipe.
10. A turbidity disturbance-resistant water quality analyzing method comprising using the turbidity disturbance-resistant water quality analyzing apparatus according to any one of claims 1 to 9, the method comprising the steps of:
obtaining the scattered light intensity I of a water sample10And transmitted light intensity I11And compare I10/I11The size of the ratio I to the preset value and the scattered light intensity I10The intensity of the preset scattered light intensity value I';
adding a first reaction reagent into a water sample to perform a first chemical reaction to generate a first test solution;
when I is10/I11Greater than I and/or I10When the light intensity is larger than I', the first test solution is filtered and re-quantified by the anti-turbidity processing unit, and the transmitted light intensity I of the first test solution after anti-turbidity processing is detected21When I is10/I11Is less than I and I10When the ratio is less than the ratio of I',skipping this step;
adding a second reaction reagent into the first test solution to perform a second chemical reaction to generate a second test solution, and obtaining the transmission light intensity I of the second test solution31；
Exhausting the second test solution in the device, and cleaning the analysis device by deionized water to obtain the transmission light intensity I of the deionized water41；
The measurement result is calculated and the next measurement is prepared.
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| PCT/CN2022/103877 WO2023020144A1 (en) | 2021-08-20 | 2022-07-05 | Anti-turbidity-interference water quality analysis device and method |
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