Colorimetric device and method for adjusting test range, and online water quality detection device

Abstract

The present application belongs to the technical field of water quality analyzers, and specifically discloses a colorimetric device and method for adjusting the test range, and an online water quality detection device. The colorimetric device includes: a fixed block, the fixed block has a first through hole, a second through hole, a third through hole and an inner groove, and the inner groove is arranged at the inner center position of the fixed block; a cuvette, the cuvette includes a cavity, and the cavity is arranged in the inner groove; a first light source and a first light detection unit, the first light source and the first light detection unit are respectively arranged on opposite sides of the second through hole; a second light source and a second light detection unit, the second light source and the second light detection unit are respectively arranged on opposite sides of the third through hole. The colorimetric device of the present application has a simple structure and a small volume, is suitable for a micro-reaction system, and is more conducive to the miniaturization and portability of the instrument. The colorimetric device of the present application can realize automatic identification of the concentration range of the water sample, thereby realizing cross-range jump, reducing the number of dilutions of high-concentration water samples, and thus shortening the instrument test time.

Description

Technical Field

[0001] The present application belongs to the technical field of water quality analyzers, and specifically relates to a colorimetric device and method for adjusting a test range, and an online water quality detection device. Background Art

[0002] At present, the colorimetric structure of water quality analyzers is complex and large in size, which is not suitable for micro-reaction systems and produces a large amount of waste liquid. At the same time, when testing water samples of unknown concentration, the first test is generally performed at the set range before the jump test is performed through signal recognition. When the analyzer has multiple ranges, the jump needs to be gradually jumped from the low range to the high range, or from the high range to the low range. This is equivalent to retesting the water sample once or multiple times. Therefore, the test time is inevitably extended and reagents are wasted. When the concentration span is large, it is easy to lose test data due to the long test time. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the purpose of the present application is to provide a colorimetric device and method for adjusting the test range and an online water quality detection device.

[0004] In one aspect of the present application, the present application proposes a colorimetric device for adjusting a test range. According to an embodiment of the present application, the colorimetric device for adjusting a test range includes:

[0005] A fixing block, the fixing block having a first through hole, a second through hole, a third through hole and an inner groove, the inner groove being arranged at the inner center of the fixing block, the first through hole penetrating the inner groove along the vertical direction of the fixing block, the second through hole penetrating the inner groove along the front-rear direction of the fixing block, and the third through hole penetrating the inner groove along the left-right direction of the fixing block;

[0006] A cuvette, the cuvette comprising a cavity, the cavity being disposed in the inner tank;

[0007] a first light source and a first light detection unit, wherein the first light source and the first light detection unit are respectively arranged at two opposite sides of the second through hole;

[0008] a second light source and a second light detection unit, wherein the second light source and the second light detection unit are respectively arranged at two opposite sides of the third through hole;

[0009] The length direction of the cavity is consistent with the direction of the second through hole, and the width direction of the cavity is consistent with the direction of the third through hole.

[0010] According to the colorimetric device for adjusting the test range of the embodiment of the present application, first, the colorimetric device has a simple structure, is easy to install, and is small in size, which is suitable for micro-reaction systems and is more conducive to the miniaturization and portability of the instrument. Second, for water samples of unknown concentration, the colorimetric device can automatically and quickly identify the test concentration range of the water sample, and then select the optimal test range. The test of the water sample with a full range of span concentration can be achieved with only one jump or no jump, which greatly saves the test time. Third, for high-range water samples, the colorimetric device can automatically select the optimal test method, such as a small optical path, which can reduce the number of dilutions, thereby solving the problem that the traditional instrument has a large system error caused by too many dilutions, which in turn affects the accuracy and stability of the test. At the same time, it can also solve the problem of poor representativeness of the water sample caused by too many dilutions when testing high concentrations.

[0011] In addition, the colorimetric device for adjusting the test range according to the above embodiment of the present application may also have the following additional technical features:

[0012] In some embodiments of the present application, the cuvette also includes a first interface and a second interface, and the first interface and the second interface are respectively arranged at opposite ends of the cavity in the vertical direction; the colorimetric device also includes a pressure plate, a sealing ring, a clamping block, a first inverted cone pressure ring and a first inverted cone joint, the pressure block has a fourth through hole, and the fourth through hole penetrates the pressure block in the vertical direction of the pressure block, the pressure plate and the sealing ring are sequentially sleeved on the outside of the first interface, the first interface extends into the fourth through hole after passing through the pressure plate and the sealing ring, the first inverted cone pressure ring is connected to the side of the first interface away from the cavity, and the first inverted cone joint is connected to the first inverted cone pressure ring.

[0013] In some embodiments of the present application, the colorimetric device also includes a second inverted cone pressure ring and a second inverted cone joint, the second inverted cone pressure ring is connected to the side of the second interface away from the cavity, and the second inverted cone joint is connected to the second inverted cone pressure ring.

[0014] In some embodiments of the present application, the length of the cavity of the cuvette is L, and the width of the cavity of the cuvette is W, satisfying L / W=3~10.

[0015] In some embodiments of the present application, the first light source is a first lamp bead, the second light source is a second lamp bead, the first light detection unit is a first silicon photocell, and the second light detection unit is a second silicon photocell.

[0016] In a second aspect of the present application, the present application proposes a method for adjusting a test range using the colorimetric device described in the above embodiment. According to an embodiment of the present application, the method includes:

[0017] (1) Calibrate a colorimetric device, wherein the channel of the colorimetric device along the length direction of the cavity is the first channel, the standard curve calibrated by the first channel is the first curve, the absorbance range of the first curve is 0~a, the range tested by the first channel includes the first range, the second range and the third range, the concentration range of the first range is 0~b, and the concentration range of the second range is , the concentration range of the third range is , n is the dilution multiple of the second range, and the value of n is 3~6;

[0018] The channel where the optical path of the colorimetric device along the width direction of the cavity is located is the second channel, the standard curve calibrated by the second channel is the second curve, and the absorbance range of the second curve is The range of the second channel test includes the first range, the second range and the third range. The concentration range of the first range is , the concentration range of the second range is , the concentration range of the third range is , n is 3-6, L represents the length of the cavity of the cuvette, W represents the width of the cavity of the cuvette, L / W ≥ n, wherein The absorbance of the first range of the second channel when testing the standard solution with concentration b;

[0019] (2) testing the absorbance of the water sample in the cuvette in the first channel and the second channel respectively, the absorbance of the first channel is c, and the absorbance of the second channel is d;

[0020] (3) determining whether c is within the absorbance range according to the range of the first channel test, and determining whether d is within the absorbance range according to the range of the second channel test;

[0021] If c and / or d are within the appropriate test interval, select the appropriate curve to calculate the water sample concentration;

[0022] If c and / or d are not within the appropriate test range, the water sample test range is determined based on the test range of the first channel, the test range of the second channel, and the values ​​of c and d, and the range is jumped. At the same time, the water sample is diluted according to the water sample test range, and then the process returns to step (2).

[0023] According to the method for automatically and quickly adjusting the test range of a water quality analyzer according to the embodiment of the present application, first, for water samples of unknown concentration, the method can automatically and quickly identify the test concentration range of the water sample, and then select the optimal test range, and can test the water sample of the full range span concentration with only one jump or no jump, which greatly saves the test time. Second, for high-range water samples, the method can automatically select the optimal test method, such as a small optical path, which can reduce the number of dilutions, thereby solving the problem of large system errors caused by too many dilutions in traditional instruments, thereby affecting the accuracy and stability of the test. At the same time, it can also solve the problem of poor representativeness of water samples caused by too many dilutions when testing high concentrations. This method dilutes n 2 You can test it The concentration range is wide, while conventional methods require dilution This method greatly reduces the dilution multiple, which not only improves the representativeness of the sample, but also reduces the system dilution error, greatly improving the test accuracy of high-concentration water samples.

[0024] In addition, the method for automatically and quickly adjusting the test range of a water quality analyzer according to the above embodiment of the present application may also have the following additional technical features:

[0025] In some embodiments of the present application, when the first range is used for testing, step (3) includes:

[0026] When 0≤c≤a, the first curve is selected to calculate the concentration value of the water sample;

[0027] When c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample;

[0028] When c>a and d>a, jump to the third range for testing, dilute the water sample according to the third range, the absorbance of the diluted water sample in the first channel is c', and the absorbance of the diluted water sample in the second channel is d'. When 0≤c'≤a, select the first curve to calculate the concentration value of the water sample. When c'>a and d'≤a, select the second curve to calculate the concentration value of the water sample.

[0029] In some embodiments of the present application, when the second range is used for testing, step (3) includes:

[0030] When a2≤c≤a, the first curve is selected to calculate the concentration value of the water sample; when c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample, wherein a2 is the absorbance of the standard solution with a concentration of b in the second range test of the first channel;

[0031] When c<a2, jump to the first range of the first curve for testing, and select the first curve to calculate the concentration value of the water sample;

[0032] When c>a and d>a, jump to the third range for testing, dilute the water sample according to the third range, the absorbance of the diluted water sample in the first channel is c'', and the absorbance of the diluted water sample in the second channel is d''. When 0≤c''≤a, select the first curve to calculate the concentration value of the water sample; when c''>a and d''≤a, select the second curve to calculate the concentration value of the water sample.

[0033] In some embodiments of the present application, when the third range is used for testing, step (3) includes:

[0034] When a3≤c≤a, the first curve is selected to calculate the concentration value of the water sample; when c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample, where a3 is the third range test concentration of the first channel. The absorbance of the standard solution;

[0035] When c<a3, jump to the first range for testing. After testing with the first range, when 0≤c≤a, select the first curve to calculate the concentration value of the water sample; when c>a, d≤a, directly select the second curve to calculate the concentration value of the water sample.

[0036] In the third aspect of the present application, the present application proposes an online water quality detection device. According to an embodiment of the present application, the online water quality detection device includes a colorimetric device for adjusting the test range of the above embodiment. Therefore, the online water quality detection device has all the advantages of the colorimetric device, which will not be repeated here.

[0037] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0039] Figure 1 An exploded schematic diagram of a colorimetric device for adjusting a test range according to an embodiment of the present application;

[0040] Figure 2 A cross-sectional schematic diagram of a colorimetric device for adjusting a test range according to an embodiment of the present application;

[0041] Figure 3 It is a schematic cross-sectional view in the AA direction of a colorimetric device for adjusting a test range according to an embodiment of the present application;

[0042] Figure 4 It is a schematic cross-sectional diagram along the BB direction of a colorimetric device for adjusting a test range according to an embodiment of the present application.

[0043] Reference numerals:

[0044] 1-fixed block, 1-1-first through hole, 1-2-second through hole, 1-3-third through hole, 2-second light detection unit, 3-first light detection unit, 4-second light source, 5-first light source, 6-cuvette, 6-1-cavity, 6-2-first interface, 6-3-second interface, 7-pressing plate, 8-sealing ring, 9-pressing block, 10-first inverted cone pressure ring, 11-first inverted cone joint, 12-second inverted cone pressure ring, 13-second inverted cone joint. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In one aspect of the present application, the present application provides a dual-path colorimetric device for adjusting the test range. Figure 1-4 The colorimetric device for adjusting the test range comprises: a fixed block 1, the fixed block 1 having a first through hole 1-1, a second through hole 1-2, a third through hole 1-3 and an inner groove, the inner groove is arranged at the inner center of the fixed block 1, the first through hole 1-1 penetrates the inner groove along the vertical direction (i.e., X direction) of the fixed block 1, the second through hole 1-2 penetrates the inner groove along the front-back direction (i.e., Y direction) of the fixed block 1, and the third through hole 1-3 penetrates the inner groove along the left-right direction (i.e., Z direction) of the fixed block 1; a cuvette 6, the cuvette 6 comprises a cavity 6- 1, the cavity 6-1 is arranged in the inner groove; the first light source 5 and the first light detection unit 3, the first light source 5 and the first light detection unit 3 are respectively arranged on the opposite sides of the second through hole 1-2; the second light source 4 and the second light detection unit 2, the second light source 4 and the second light detection unit 2 are respectively arranged on the opposite sides of the third through hole 1-3; and the length direction of the cavity 6-1 is consistent with the direction of the second through hole 1-2 (i.e., the Y direction), and the width direction of the cavity 6-1 is consistent with the direction of the third through hole 1-3 (i.e., the Z direction).

[0051] According to the dual-optical path colorimetric device for adjusting the test range of the embodiment of the present application, first, the colorimetric device has a simple structure, is easy to install, and is small in size, which is suitable for micro-reaction systems and is more conducive to the miniaturization and portability of the instrument. Second, for water samples of unknown concentration, the colorimetric device can automatically and quickly identify the test concentration range of the water sample, and then select the optimal test range. The test of the water sample with a full range of span concentration can be achieved with only one jump or no jump, which greatly saves the test time. Third, for high-range water samples, the colorimetric device can automatically select the optimal test method, such as a small optical path, which can reduce the number of dilutions, thereby solving the problem that the traditional instrument has a large system error caused by too many dilutions, which in turn affects the accuracy and stability of the test. At the same time, it can also solve the problem of poor representativeness of the water sample caused by too many dilutions when testing high concentrations.

[0052] According to some specific embodiments of the present application, Figure 1-4The cuvette 6 also includes a first interface 6-2 and a second interface 6-3, which are respectively arranged at opposite ends of the cavity 6-1 in the vertical direction; the colorimetric device also includes a pressure plate 7, a sealing ring 8, a clamping block 9, a first inverted cone pressure ring 10 and a first inverted cone joint 11, the clamping block 9 has a fourth through hole, and the fourth through hole penetrates the clamping block 9 in the vertical direction of the clamping block 9, the pressure plate 7 and the sealing ring 8 are sequentially sleeved on the outside of the first interface 6-2, the first interface 6-2 extends to the fourth through hole after passing through the pressure plate 7 and the sealing ring 8, the first inverted cone pressure ring 10 is connected to the side of the first interface 6-2 away from the cavity 6-1, and the first inverted cone joint 11 is connected to the first inverted cone pressure ring 10.

[0053] According to some further specific embodiments of the present application, refer to the attached Figure 1-4 The colorimetric device also includes a second inverted cone pressure ring 12 and a second inverted cone joint 13. The second inverted cone pressure ring 12 is connected to the side of the second interface 6-3 away from the cavity 6-1, and the second inverted cone joint 13 is connected to the second inverted cone pressure ring 12.

[0054] As some specific embodiments, both opposite ends of the first through hole 1-1 are threaded. A fourth through hole with threads is provided at the center of the pressing block 9, a chamfer is provided at the bottom of the fourth through hole, and a blind hole is provided on each side of the fourth through hole.

[0055] The overall installation of the above colorimetric device is shown in the attached Figure 1-4 As shown, the cuvette 6 is placed in the inner groove of the fixed block 1, and then the pressure plate 7 and the sealing ring 8 are sleeved on the outside of the first interface 6-2 in turn, and then the clamping block 9 and the fixed block 1 are fastened by threaded connection using a tool, so that a clamping force is formed between the clamping block 9 and the pressure plate 7. Because the clamping block 9 is provided with a chamfer, the sealing ring 8 forms a concentric fixing effect on the cuvette 6 with the clamping block 9 under the dual effects of the chamfer of the clamping block 9 and the clamping force. Then, the first inverted cone pressure ring 10 and the first inverted cone joint 11 are respectively installed in the corresponding holes of the pressure block 9 and the fixed block 1 in turn, the first inverted cone pressure ring 10 is connected to the upper end of the cuvette 6, the first inverted cone pressure ring 10 is connected to the first inverted cone joint 11, the second inverted cone pressure ring 12 is connected to the lower end of the cuvette 6, the second inverted cone pressure ring 12 is connected to the second inverted cone joint 13, and the first inverted cone joint 11 and the second inverted cone joint 13 are respectively connected to the external pipeline. The first inverted cone pressure ring 10 and the second inverted cone pressure ring 12 have certain elasticity. Under the tightening force of the inverted cone joint, the inverted cone pressure ring will form a good sealing effect with the cuvette 6, so that the cuvette 6 will not leak during the subsequent liquid injection process.

[0056] The first light source 5 (e.g., lamp bead) and the first light detection unit 3 (e.g., silicon photocell) are placed on opposite sides of the second through hole 1-2, and the first light source 5 and the first light detection unit 3 are arranged oppositely. The second light source 4 (e.g., lamp bead) and the second light detection unit 2 (e.g., silicon photocell) are placed on opposite sides of the third through hole 1-3, and the second light source 4 and the second light detection unit 2 are arranged oppositely. The lamp bead and the silicon photocell are connected to the external circuit respectively. The light emitted by the lamp bead is incident on the cuvette 6 through the through hole at the notch position of the fixing block 1 and then reaches the silicon photocell to achieve the purpose of detection.

[0057] The present application uses the ingenious and reasonable design of the fixing block 1, the pressure plate 7, the sealing ring 8 and the clamping block 9 to make the entire module very simple and reliable in structure while achieving all functional requirements, and can be achieved at a lower production cost. At the same time, due to its simple structure, it can be maintenance-free, which provides great convenience for subsequent product assurance and after-sales service.

[0058] The sealing ring 8 and the pressure plate 7 in the present application can be retained or eliminated, and both can achieve the desired functions. The above-mentioned inverted cone joint and inverted cone pressure ring can also be replaced by other joints that can connect pipelines. The installation method of the lamp bead, silicon photovoltaic cell and fixing block 1 can be a press-fit method or a method of fixing with fasteners.

[0059] According to some further specific embodiments of the present application, the length of the cavity 6-1 of the cuvette 6 is L, and the width of the cavity 6-1 of the cuvette 6 is W, satisfying L / W=3~10. The L / W and the dilution factor can be adjusted according to actual application requirements to adjust the test range of the entire system, L / W≥n, where n is the dilution factor of the second range.

[0060] The structure of the dual-optical path colorimetric module is not particularly limited, and may be a rectangular parallelepiped, a hexagonal shape, a cylindrical shape, an ellipsoidal shape, or an irregular structure, as long as a dual-optical path or multi-optical path structure can be achieved.

[0061] In a second aspect of the present application, the present application proposes a method for adjusting the test range using the colorimetric device of the above embodiment. According to an embodiment of the present application, the above method includes:

[0062] S100: Calibrate the colorimetric device;

[0063] In this step, the colorimetric device is calibrated, the channel where the optical path of the colorimetric device along the length direction of the cavity is located is the first channel, the standard curve calibrated by the first channel is the first curve, the absorbance range of the first curve is 0~a, the range tested by the first channel includes the first range, the second range and the third range, the concentration range of the first range is 0~b, the second range is diluted n times, and the concentration range of the second range is , third range dilution times, the concentration range of the third range is , n is 3~6;

[0064] The channel where the optical path of the colorimetric device along the width direction of the cavity is located is the second channel, the standard curve calibrated by the second channel is the second curve, the absorbance range of the second curve is a1~a, the range tested by the second channel includes the first range, the second range and the third range, and the concentration range of the first range is , n is the dilution multiple of the second range, and the concentration range of the second range is , third range dilution n 2 times, the concentration range of the third range is , n is 3 to 6, preferably 4 to 5, L represents the length of the cavity of the cuvette, W represents the width of the cavity of the cuvette, and L / W ≥ n. Wherein a1 is the absorbance of the first range of the second channel when testing the concentration b standard solution.

[0065] S200: Test the absorbance of the water sample in the cuvette in the first channel and the second channel respectively;

[0066] In this step, the absorbance of the water sample in the cuvette is tested in the first channel and the second channel respectively, the absorbance of the first channel is c, and the absorbance of the second channel is d. The first channel and the second channel can be tested simultaneously, or they can be tested sequentially by adjusting the start-up order of the light source.

[0067] S300: judging whether c is within the absorbance range according to the range of the first channel test, and judging whether d is within the absorbance range according to the range of the second channel test;

[0068] In this step, it is determined whether c is within the absorbance range according to the range of the first channel test, and it is determined whether d is within the absorbance range according to the range of the second channel test;

[0069] If c and / or d are within the appropriate test interval, select the appropriate curve to calculate the water sample concentration;

[0070] If c and / or d are not within the appropriate test range, the water sample test range is determined based on the range of the first channel test, the range of the second channel test and the values ​​of c and d, and the range is jumped. At the same time, the water sample is diluted according to the water sample test range, and then returns to step S200.

[0071] According to some specific embodiments of the present application, when the first range is used for testing, step S300 includes:

[0072] When 0≤c≤a, select the first curve to calculate the concentration value of the water sample;

[0073] When c>a and d≤a, there is no need to dilute to the second range for testing, and the second curve can be directly selected to calculate the concentration value of the water sample;

[0074] When c>a and d>a, directly jump to the third range for testing, dilute the water sample according to the third range, the absorbance of the diluted water sample in the first channel is c', and the absorbance of the diluted water sample in the second channel is d'. When 0≤c'≤a, select the first curve to calculate the concentration value of the water sample. When c'>a and d'≤a, select the second curve to calculate the concentration value of the water sample.

[0075] According to some further specific embodiments of the present application, when the second range is used for testing, step S300 includes:

[0076] When a2≤c≤a, select the first curve to calculate the concentration of the water sample; when c>a and d≤a, directly select the second curve to calculate the concentration of the water sample, where a2 is the absorbance of the standard solution with a concentration of b in the second range of the first channel;

[0077] When c<a2, jump to the first range of the first curve for testing, and select the first curve to calculate the concentration value of the water sample;

[0078] When c>a and d>a, jump to the third range for testing, dilute the water sample according to the third range, the absorbance of the diluted water sample in the first channel is c'', and the absorbance of the diluted water sample in the second channel is d''. When 0≤c''≤a, select the first curve to calculate the concentration value of the water sample; when c''>a and d''≤a, select the second curve to calculate the concentration value of the water sample.

[0079] According to some further specific embodiments of the present application, when the third range is used for testing, step S300 includes:

[0080] When a3≤c≤a, select the first curve to calculate the concentration of the water sample; when c>a and d≤a, select the second curve to calculate the concentration of the water sample, where a3 is the third range test concentration of the first channel. The absorbance of the standard solution;

[0081] When c<a3, there is no need to adjust to the second range for testing. Directly jump to the first range for testing. After testing with the first range, when 0≤c≤a, select the first curve to calculate the concentration value of the water sample; when c>a, d≤a, directly select the second curve to calculate the concentration value of the water sample.

[0082] According to the method for automatically and quickly adjusting the test range of a water quality analyzer according to the embodiment of the present application, first, for water samples of unknown concentration, the method can automatically and quickly identify the test concentration range of the water sample, and then select the optimal test range, and can test the water sample of the full range span concentration with only one jump or no jump, which greatly saves the test time. Second, for high-range water samples, the method can automatically select the optimal test method, such as a short optical path, which can reduce the number of dilutions, thereby solving the problem of large system errors caused by too many dilutions in traditional instruments, thereby affecting the accuracy and stability of the test. At the same time, it can also solve the problem of poor representativeness of water samples caused by too many dilutions when testing high concentrations. This method dilutes n 2 You can test it The concentration range is wide, while conventional methods require dilution This method greatly reduces the dilution multiple, which not only improves the representativeness of the sample, but also reduces the system dilution error, greatly improving the test accuracy of high-concentration water samples.

[0083] In the third aspect of the present application, the present application proposes an online water quality detection device. According to an embodiment of the present application, the online water quality detection device includes a colorimetric device for adjusting the test range of the above embodiment. Therefore, the online water quality detection device has all the advantages of the colorimetric device, which will not be repeated here.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A colorimetric device for adjusting a test range, characterized in that: include: A fixing block, the fixing block having a first through hole, a second through hole, a third through hole and an inner groove, the inner groove being arranged at the inner center of the fixing block, the first through hole penetrating the inner groove along the vertical direction of the fixing block, the second through hole penetrating the inner groove along the front-rear direction of the fixing block, and the third through hole penetrating the inner groove along the left-right direction of the fixing block; A cuvette, the cuvette comprising a cavity, the cavity being disposed in the inner tank; a first light source and a first light detection unit, wherein the first light source and the first light detection unit are respectively arranged at two opposite sides of the second through hole; a second light source and a second light detection unit, wherein the second light source and the second light detection unit are respectively arranged at two opposite sides of the third through hole; The length direction of the cavity is consistent with the direction of the second through hole, and the width direction of the cavity is consistent with the direction of the third through hole; The length of the cavity of the cuvette is L, and the width of the cavity of the cuvette is W, satisfying L / W=3~10.

2. The colorimetric device for adjusting the test range according to claim 1, characterized in that: The cuvette further comprises a first interface and a second interface, wherein the first interface and the second interface are respectively arranged at two opposite ends of the cavity along the vertical direction; The colorimetric device also includes a pressure plate, a sealing ring, a clamping block, a first inverted cone pressure ring and a first inverted cone joint. The pressure block has a fourth through hole, and the fourth through hole penetrates the pressure block along the vertical direction of the pressure block. The pressure plate and the sealing ring are sequentially sleeved on the outside of the first interface, and the first interface extends into the fourth through hole after passing through the pressure plate and the sealing ring. The first inverted cone pressure ring is connected to the side of the first interface away from the cavity, and the first inverted cone joint is connected to the first inverted cone pressure ring.

3. The colorimetric device for adjusting the test range according to claim 2, characterized in that: The colorimetric device also includes a second inverted cone pressure ring and a second inverted cone joint, wherein the second inverted cone pressure ring is connected to a side of the second interface away from the cavity, and the second inverted cone joint is connected to the second inverted cone pressure ring.

4. The colorimetric device for adjusting the test range according to any one of claims 1 to 3, characterized in that: The first light source is a first lamp bead, the second light source is a second lamp bead, the first light detection unit is a first silicon photocell, and the second light detection unit is a second silicon photocell.

5. A method for adjusting a test range using the colorimetric device according to any one of claims 1 to 4, characterized in that: include: (1) Calibrate a colorimetric device, wherein the channel of the colorimetric device along the length direction of the cavity is the first channel, the standard curve calibrated by the first channel is the first curve, the absorbance range of the first curve is 0~a, the range tested by the first channel includes the first range, the second range and the third range, the concentration range of the first range is 0~b, and the concentration range of the second range is , the concentration range of the third range is , n is the dilution multiple of the second range, and the value of n is 3~6; The channel where the optical path of the colorimetric device along the width direction of the cavity is located is the second channel, the standard curve calibrated by the second channel is the second curve, and the absorbance range of the second curve is The range of the second channel test includes the first range, the second range and the third range. The concentration range of the first range is , the concentration range of the second range is , the concentration range of the third range is , n is 3-6, L represents the length of the cavity of the cuvette, W represents the width of the cavity of the cuvette, L / W ≥ n, wherein The absorbance of the first range of the second channel when testing the standard solution with concentration b; (2) testing the absorbance of the water sample in the cuvette in the first channel and the second channel respectively, the absorbance of the first channel is c, and the absorbance of the second channel is d; (3) determining whether c is within the absorbance range according to the range of the first channel test, and determining whether d is within the absorbance range according to the range of the second channel test; If c and / or d are within the appropriate test interval, select the appropriate curve to calculate the water sample concentration; If c and / or d are not within the appropriate test range, the water sample test range is determined according to the test range of the first channel, the test range of the second channel, and the values ​​of c and d, and the range is jumped. At the same time, the water sample is diluted according to the test range of the water sample, and then the process returns to step (2); When the first range is used for testing, step (3) includes: When 0≤c≤a, the first curve is selected to calculate the concentration value of the water sample; When c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample; When c>a and d>a, jump to the third range gear for testing, dilute the water sample according to the third range, the absorbance of the diluted water sample in the first channel is c', and the absorbance of the diluted water sample in the second channel is d'. When 0≤c'≤a, select the first curve to calculate the concentration value of the water sample. When c'>a and d'≤a, select the second curve to calculate the concentration value of the water sample. When the second range is used for testing, step (3) includes: When a2≤c≤a, the first curve is selected to calculate the concentration value of the water sample; when c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample, wherein a2 is the absorbance of the standard solution with a concentration of b in the second range test of the first channel; When c<a2, jump to the first range of the first curve for testing, and select the first curve to calculate the concentration value of the water sample; When c>a and d>a, the test is performed by switching to the third range, and the water sample is diluted according to the third range. The absorbance of the diluted water sample in the first channel is c'', and the absorbance of the diluted water sample in the second channel is d''. When 0≤c''≤a, the first curve is selected to calculate the concentration value of the water sample; when c''>a and d''≤a, the second curve is selected to calculate the concentration value of the water sample; When the third range is used for testing, step (3) includes: When a3≤c≤a, the first curve is selected to calculate the concentration value of the water sample; when c>a and d≤a, the second curve is selected to calculate the concentration value of the water sample, where a3 is the third range test concentration of the first channel. The absorbance of the standard solution; When c<a3, jump to the first range for testing. After testing with the first range, when 0≤c≤a, select the first curve to calculate the concentration value of the water sample; when c>a, d≤a, directly select the second curve to calculate the concentration value of the water sample.

6. An online water quality detection device, characterized in that: A colorimetric device for adjusting a test range comprising any one of claims 1 to 4.

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