Test strip
The integrated design of the test strips solves the problem of inconvenient operation of multiple test strips in the existing technology, and enables the simultaneous detection of nitrite, borax and pesticides, improving the convenience and efficiency of the detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, food testing requires the use of multiple test strips to detect nitrite, borax, and pesticides separately, which is inconvenient to operate.
Design an integrated test strip that includes a nitrite detection unit, a borax detection unit, and a pesticide detection unit, all integrated on the same substrate. It can simultaneously detect multiple indicators by reacting with different detection solutions to achieve color development.
It enables simultaneous detection of multiple food safety indicators, simplifies the operation process, improves convenience, and reduces the complexity of testing.
Smart Images
Figure CN122259548A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of testing equipment technology, and in particular to a test strip. Background Technology
[0002] Food safety indicators are various technical requirements established to ensure food safety. They include various factors and key links that affect food safety during food production and operation. Testing food safety indicators is of great significance for food safety, consumer health, and maintaining the integrity and quality standards of the food industry.
[0003] In existing technologies, food testing products can usually only test a single food safety indicator. If users need a more comprehensive understanding of multiple food safety indicators, they need to use multiple food testing products to test the food separately.
[0004] However, the above method requires the use of multiple food testing products to test the food, which is not very convenient. Summary of the Invention
[0005] This application provides a test strip to solve the problem of poor convenience in using multiple food testing products in the prior art.
[0006] This application provides a test strip, comprising: a base layer, and nitrite detection unit, borax detection unit and pesticide detection unit spaced apart on the base layer;
[0007] The nitrite detection unit has a nitrite detection solution for detecting nitrite, the borax detection unit has a borax detection solution for detecting borax, and the pesticide detection unit has a pesticide detection solution for detecting pesticides.
[0008] In some embodiments, the nitrite detection solution includes several of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride, chitosan, and disodium citrate-phosphate.
[0009] In some embodiments, the mass ratio of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride and chitosan in the nitrite detection solution is (0~20):(10~30):(1~4).
[0010] In some embodiments, the borax detection solution includes several of the following: sodium carboxymethyl cellulose, curcumin, 3,3',5,5'-tetramethylbenzidine, and disodium citrate-hydrogen phosphate.
[0011] In some embodiments, the mass ratio of sodium hydroxymethyl cellulose, curcumin and 3,3',5,5'-tetramethylbenzidine in the borax detection solution is (1~5):(1~20):(0~4).
[0012] In some embodiments, the pesticide detection solution includes several of the following: 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, acetylcholinesterase, acetylthiocholine chloride, and disodium citrate-phosphate.
[0013] In some embodiments, the molar ratio of 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, and acetylthiocholine chloride in the pesticide detection solution is (50~140):(1~10):(0~30):(10~40).
[0014] In some embodiments, a pesticide detection control unit is also included, which is disposed on the base layer and disposed on one side of the pesticide detection unit.
[0015] In some embodiments, a connecting layer and a protective layer are also included, wherein the base layer is disposed on the connecting layer, and the protective layer is disposed on the base layer and detachably connected to the connecting layer;
[0016] The nitrite detection unit, the borax detection unit, and the pesticide detection unit are spaced apart on the side of the base layer facing the protective layer.
[0017] In some embodiments, the connecting layer has an adhesive portion, and the protective layer is bonded to the adhesive portion.
[0018] In some embodiments, the base layer has at least three spaced mounting portions, and the nitrite detection unit, the borax detection unit, and the pesticide detection unit are connected to the mounting portions respectively.
[0019] In some embodiments, the mounting part is a mounting hole, and the nitrite detection unit, the borax detection unit and the pesticide detection unit are respectively embedded in the mounting hole.
[0020] In some embodiments, an absorbent layer is also included, which is disposed between the base layer and the connecting layer.
[0021] In some embodiments, a waterproof layer is also included, which is disposed between the absorbent layer and the connecting layer.
[0022] This application discloses a test strip comprising a base layer and nitrite detection units, borax detection units, and pesticide detection units spaced apart on the base layer. The nitrite detection unit contains a nitrite detection solution for detecting nitrite, the borax detection unit contains a borax detection solution for detecting borax, and the pesticide detection unit contains a pesticide detection solution for detecting pesticides. By integrating the nitrite, borax, and pesticide detection units onto the base layer, the test strip can simultaneously detect the concentrations of nitrite, borax, and pesticides in the sample, facilitating the testing of multiple safety indicators in food and effectively ensuring food safety. Furthermore, it eliminates the need for multiple test strips during testing, making it convenient for daily use. Furthermore, during testing, the sample is reacted with nitrite detection solution, borax detection solution, and pesticide detection solution to cause color development in the nitrite detection unit, borax detection unit, and pesticide detection unit. The concentration of nitrite, borax, and pesticide in the sample can be determined based on the color development of the nitrite detection unit, borax detection unit, and pesticide detection unit, without the need for other auxiliary settings, making the operation relatively simple and convenient. Attached Figure Description
[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0024] Figure 1 This is a schematic diagram of the structure of the test strip provided in the embodiments of this application;
[0025] Figure 2 for Figure 1 An explosion diagram.
[0026] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.
[0027] Explanation of reference numerals in the attached figures:
[0028] 100 - Base layer; 110 - Nitrite detection unit; 120 - Borax detection unit; 130 - Pesticide detection unit; 140 - Pesticide detection control unit;
[0029] 200-Connection layer;
[0030] 300 - Protective layer;
[0031] 400-Absorption Layer;
[0032] 500 - Waterproof layer. Detailed Implementation
[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0034] Currently, nitrites are widely used as color-protecting agents in meat products such as cured sausages, bacon, and ham. However, high doses of nitrites are highly toxic, and excessive or improper use can seriously harm human health, including causing cancer, birth defects, and mutations. Borax is used in the processing of zongzi (sticky rice dumplings), pastries, meat, and flour products, serving as a preservative, increasing elasticity, crispness, and expansion. Borax is highly toxic; long-term, low-dose ingestion can accumulate and cause multi-organ poisoning, while large-dose ingestion can cause acute boric acid poisoning, posing a significant threat to human health. Pesticides are widely used, and although most organic pesticides have low residue concentrations, they typically possess characteristics such as high toxicity, long half-life, slow degradation in nature, and bioaccumulation, posing significant harm to human health and the environment.
[0035] In existing technologies, test strips can only provide detection for a single food safety indicator. To detect nitrite, borax, and pesticide content in food, separate nitrite, borax, and pesticide test strips must be used. Users need to use multiple test strips simultaneously to detect multiple food safety indicators, which is inconvenient. Furthermore, some testing devices currently on the market require auxiliary equipment, making daily operation inconvenient for users.
[0036] Based on this, this application provides a test strip, including: a base layer, and nitrite detection units, borax detection units, and pesticide detection units spaced apart on the base layer. The nitrite detection unit has a nitrite detection solution for detecting nitrite, the borax detection unit has a borax detection solution for detecting borax, and the pesticide detection unit has a pesticide detection solution for detecting pesticides. By integrating the nitrite detection unit, borax detection unit, and pesticide detection unit on the base layer, the test strip can simultaneously detect the concentrations of nitrite, borax, and pesticides in the sample to be tested, facilitating users to detect multiple safety indicators in food and effectively ensuring food safety. Furthermore, multiple test strips are not required during testing, making daily use more convenient. Furthermore, during testing, the sample is reacted with nitrite detection solution, borax detection solution, and pesticide detection solution, causing color development in the nitrite detection unit, borax detection unit, and pesticide detection unit. The concentrations of nitrite, borax, and pesticides in the sample can then be determined based on the color development of these three units. The test strip of this application requires no additional auxiliary settings, making operation simple and convenient.
[0037] The embodiments of this application are described below with reference to the accompanying drawings.
[0038] Reference Figure 1 and Figure 2 The test strip provided in this application includes: a base layer 100, and nitrite detection units 110, borax detection units 120, and pesticide detection units 130 spaced apart on the base layer 100. The nitrite detection unit 110 has a nitrite detection solution for detecting nitrite, the borax detection unit 120 has a borax detection solution for detecting borax, and the pesticide detection unit 130 has a pesticide detection solution for detecting pesticides.
[0039] Specifically, when testing the sample, the sample is sequentially added to the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130. After a period of time, the sample reacts with the nitrite detection solution, borax detection solution, and pesticide detection solution, causing color development in the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130. The concentrations of nitrite, borax, and pesticides in the sample can then be determined by comparing the color development of the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 with a color chart.
[0040] In this application, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 are arranged alternately, so that the detection systems of the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 are independent of each other and do not interfere with each other, thus not affecting the detection results of the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130. Furthermore, the samples tested by the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 can be the same food sample; therefore, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 can be placed on the same base layer 100.
[0041] The test strip provided in this application integrates the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 on the base layer 100. This allows the test strip to simultaneously detect the concentrations of nitrite, borax, and pesticides in the sample, facilitating the detection of multiple safety indicators in food and effectively ensuring food safety. Furthermore, it eliminates the need for multiple test strips during testing, making it convenient for daily use. The test strip of this application also requires no other auxiliary settings, making operation simple and convenient.
[0042] In some embodiments, the nitrite detection solution includes several of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride, chitosan, and disodium citrate-phosphate.
[0043] The nitrite detection unit 110 includes filter paper disposed on the base layer 100. Nitrite detection solution is dropped onto the filter paper and dried at room temperature to form the nitrite detection unit 110.
[0044] For example, the filter paper can be glass fiber filter paper.
[0045] The nitrite detection solution can be composed of several of the following: p-aminobenzenesulfonic acid solution, m-phenylenediamine hydrochloride aqueous solution, chitosan solution, and citrate-disodium hydrogen phosphate solution.
[0046] In some embodiments, the mass ratio of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride and chitosan in the nitrite detection solution is (0~20):(10~30):(1~4).
[0047] For example, the mass ratio of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride and chitosan can be 3:15:2, 0:21:1 or 2:13:3, etc.
[0048] Specifically, the nitrite detection solution can be composed of several of the following: 3 μL of 6 mg / mL p-aminobenzenesulfonic acid solution, 3 μL of 8 mg / mL m-phenylenediamine hydrochloride aqueous solution, 2.5 μL of 0.5 mg / mL chitosan solution, and 3 μL of 1 mol / L citrate-disodium hydrogen phosphate solution at pH 4.
[0049] In the nitrite detection solution of this application, when the mass ratio of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride and chitosan is within the above-mentioned range, the detection sensitivity of the nitrite detection unit 110 is high.
[0050] In some embodiments, the borax detection solution includes several of the following: sodium carboxymethyl cellulose, curcumin, 3,3',5,5'-tetramethylbenzidine, and disodium citrate-hydrogen phosphate.
[0051] The borax detection unit 120 includes filter paper disposed on the base layer 100. Borax detection solution is dropped onto the filter paper and dried at room temperature to form the borax detection unit 120.
[0052] Borax detection solution can be composed of several of the following: sodium carboxymethyl cellulose aqueous solution, curcumin ethanol solution, 3,3',5,5'-tetramethylbenzidine aqueous solution, and citrate-disodium hydrogen phosphate solution.
[0053] In some embodiments, the mass ratio of sodium hydroxymethylcellulose, curcumin and 3,3',5,5'-tetramethylbenzidine in the borax detection solution is (1~5):(1~20):(0~4).
[0054] For example, the mass ratio of sodium carboxymethyl cellulose, curcumin and 3,3',5,5'-tetramethylbenzidine can be 2:10:0, 3:12:1 or 4:16:1, etc.
[0055] Specifically, the borax detection solution can be composed of several of the following: 3 μL of 1 mg / mL sodium carboxymethyl cellulose aqueous solution, 5 μL of 0.2 mg / mL curcumin ethanol solution, 2.5 μL of 0.4 mg / mL 3,3',5,5'-tetramethylbenzidine aqueous solution, and 2.5 μL of 20 mM citrate-disodium hydrogen phosphate solution at pH 7.
[0056] The detection range of existing borax test strips is 0~8000 mg / L. In this application, the detection range of the borax detection unit 120 can reach 0~10000 mg / L, thus broadening the detection range of the borax detection unit 120.
[0057] In the borax detection solution of this application, when the mass ratio of sodium hydroxymethyl cellulose, curcumin and 3,3',5,5'-tetramethylbenzidine is within the above-mentioned range, the detection sensitivity of the borax detection unit 120 is high and the detection time is short.
[0058] In some embodiments, the pesticide detection solution includes several of the following: 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, acetylcholinesterase, acetylthiocholine chloride, and disodium citrate-phosphate.
[0059] The pesticide detection unit 130 includes filter paper set on the base layer 100. Pesticide detection liquid is dripped onto the filter paper and dried at room temperature to form the pesticide detection unit 130.
[0060] The pesticide detection solution can be composed of several of the following: 5,5'-dithiobis(2-nitrobenzoic acid) ethanol solution, sodium alginate aqueous solution, acetylcholinesterase aqueous solution, ammonium chloride aqueous solution, acetylthiocholine chloride aqueous solution, and citrate-disodium hydrogen phosphate solution.
[0061] In some embodiments, the molar ratio of 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, and acetylthiocholine chloride in the pesticide detection solution is (50~140):(1~10):(0~30):(10~40).
[0062] For example, the molar ratio of 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, and acetylthiocholine chloride can be 130:3:0:29, 135:1:1:27, or 121:3:1:40, etc.
[0063] Specifically, the pesticide detection solution consists of several of the following: 2.5 μL of 25 mM 5,5'-dithiobis(2-nitrobenzoic acid) ethanol solution, 1 μL of 3 mM sodium alginate aqueous solution, 5 μL of 1 U / mL acetylcholinesterase aqueous solution, 5 μL of 5 mM ammonium chloride aqueous solution, and 20 mM citrate-disodium hydrogen phosphate solution at pH 8. After the sample to be tested is added to the pesticide detection unit 130, 2.5 μL of 6 mM acetylthiocholine chloride aqueous solution is added to the pesticide detection unit 130.
[0064] The minimum detection limit (LDL) of existing pesticide test strips is 2.5 mg / L. When the concentration of pesticide in the sample is below the LDL, the test strip cannot detect the presence of the substance. However, this does not mean that pesticide is not present in the sample, but rather that the pesticide content is below the minimum level that the test strip can detect. In this application, the minimum detection limit of the pesticide detection unit 130 can reach 0.01 mg / L, broadening the detection range of the pesticide detection unit 130. It can detect trace amounts of pesticides in food, thus improving safety.
[0065] In the pesticide detection solution of this application, when the molar ratio of 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, and acetylthiocholine chloride is within the above-mentioned range, the pesticide detection unit 130 has high detection sensitivity and requires a short detection time.
[0066] The test strip provided in this application embodiment can adjust the composition ratio of the nitrite detection solution, the borax detection solution, and the pesticide detection solution to make the color development time of the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 consistent, thereby facilitating users to obtain test results.
[0067] In some embodiments, the test strip further includes a pesticide detection control unit 140, which is disposed on the base layer 100 and is disposed on one side of the pesticide detection unit 130.
[0068] In this process, when detecting the pesticide concentration in the sample, the sample is added to the pesticide detection unit 130, and purified water is added to the pesticide control unit 140. Then, acetylthiocholine chloride solution is added to both the pesticide detection unit 130 and the pesticide control unit 140. The pesticide control unit 140 is set up for comparison with the pesticide detection unit 130, thus facilitating the assessment of the color development of the pesticide detection unit 130. The pesticide control unit 140 is placed to one side of the pesticide detection unit 130 for easy comparison by the user.
[0069] When testing the sample using test strips, the sample is first crushed at room temperature and soaked in purified water, then left to stand for a period of time to obtain the test sample solution. The sample can be the food to be tested, such as sausage, noodles, or vegetables. The supernatant of the test sample solution is then added dropwise to the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130, respectively. Simultaneously, purified water is added dropwise to the pesticide detection control unit 140, and acetylthiocholine chloride solution is added dropwise to both the pesticide detection unit 130 and the pesticide detection control unit 140. After a preset time, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 react with the test sample solution, resulting in color development. Finally, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 are compared with a color chart to identify the presence of nitrite, borax, and pesticides in the test sample. The preset time can be determined based on the color development time of the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130. For example, the preset time can be 1 minute. Thus, the test strip provided in this embodiment only requires adding the sample to be tested to the test strip, without the need for heating or other operations, making it simple and convenient to use.
[0070] Reference Figure 2 In its specific implementation, the test strip also includes a connecting layer 200 and a protective layer 300. The base layer 100 is disposed on the connecting layer 200, and the protective layer 300 is disposed on the base layer 100 and detachably connected to the connecting layer 200. The nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 are spaced apart on the side of the base layer 100 facing the protective layer 300.
[0071] Among them, the base layer 100 is a hydrophobic carrier to better separate the nitrite detection unit 110, the borax detection unit 120 and the pesticide detection unit 130, so that the nitrite detection unit 110, the borax detection unit 120 and the pesticide detection unit 130 do not interfere with each other, thereby avoiding affecting the detection accuracy.
[0072] For example, the base layer 100 can be made of silicone paper material, and the thickness of the base layer 100 can be 0.1 mm.
[0073] Specifically, when using the test strip, first place the test strip on the operating platform, keeping the protective layer 300 facing upwards. Then remove the protective layer 300 to expose the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 upwards. Afterwards, the sample to be tested can be added to the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 respectively using a dropper.
[0074] Thus, by setting up a base layer 100, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 are supported. A connecting layer 200 is also provided to support the base layer 100. A protective layer 300 is provided, covering the base layer 100 and connected to the connecting layer 200, to protect the base layer 100 from external contamination of the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130, thereby extending the shelf life of the test strips. The protective layer 300 is detachably connected to the connecting layer 200, allowing for easy removal of the protective layer 300 when using the test strips.
[0075] In some embodiments, the connecting layer 200 has an adhesive portion, and the protective layer 300 is bonded to the adhesive portion.
[0076] In this design, the base layer 100 and the connecting layer 200 are located opposite each other in their central regions. The adhesive portion is located on the side of the connecting layer 200 facing the protective layer 300, and it is situated on the periphery of the central region of the connecting layer 200 to facilitate bonding between the protective layer 300 and the adhesive portion. This also ensures a tight bond between the protective layer 300 and the connecting layer 200 around its perimeter, providing oxygen isolation and anti-fouling protection for the base layer 100. This ensures the effectiveness of the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130, extending the shelf life of the test strips.
[0077] For example, the connecting layer 200 may be a strip material with adhesive on one side, with the adhesive side facing the base layer 100. The protective layer 300 may be an opaque release paper to facilitate removal of the protective layer 300 from the connecting layer 200 when test strips are required. The connecting layer 200 may be made of opaque PET material with a thickness of 0.2 mm.
[0078] Furthermore, the connecting layer 200 can completely overlap with the protective layer 300, and the connecting layer 200 and the protective layer 300 have the same shape and size. For example, the connecting layer 200 can be rectangular, and the length and width of the connecting layer 200 can be 6 cm and 4 cm, respectively.
[0079] In a specific implementation, the base layer 100 has at least three spaced mounting sections, with the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 connected to the mounting sections respectively.
[0080] The installation unit facilitates the connection of the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 to the base layer 100.
[0081] In some embodiments, the mounting part is a mounting hole provided on the base layer 100, and the nitrite detection unit 110, the borax detection unit 120 and the pesticide detection unit 130 are respectively embedded in the mounting hole.
[0082] Specifically, the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 can be fitted into the mounting holes by friction.
[0083] For example, the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 can have the same shape and size, all being rectangular, with a length and width of 1 cm and 0.5 cm, respectively. The mounting holes are also rectangular, with a length and width of 1 cm and 0.5 cm, respectively. The mounting holes are arranged sequentially at intervals, with a distance of 0.3 cm between adjacent mounting holes. This allows the nitrite detection unit 110, borax detection unit 120, and pesticide detection unit 130 to fit tightly into the mounting holes, thereby improving the structural stability of the test strip.
[0084] Furthermore, the base layer 100 can also be set as a rectangle, with a length and width of 4.5 cm and 2.5 cm respectively.
[0085] In some embodiments, the test strip further includes an absorption layer 400 disposed between the base layer 100 and the connecting layer 200, and the absorption layer 400 is bonded to the nitrite detection unit 110, the borax detection unit 120 and the pesticide detection unit 130.
[0086] The absorbent layer 400 can be made of a porous material. The absorbent layer 400 is used to absorb excess sample liquid that seeps out from the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130.
[0087] For example, the absorbent layer 400 may be made of cotton fiber filter paper material, the pore size of the absorbent layer 400 may be 12 micrometers, and the thickness of the absorbent layer 400 may be 0.1 millimeters.
[0088] Specifically, the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130 are embedded in the mounting hole. The absorbent layer 400 is attached to the side of the base layer 100 that is away from the protective layer 300, so that the absorbent layer 400 can be tightly attached to the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130, thereby facilitating the absorption of excess test sample liquid seeping from the nitrite detection unit 110, the borax detection unit 120, and the pesticide detection unit 130.
[0089] In some examples, the periphery of the absorbent layer 400 is bonded to the periphery of the base layer 100 using adhesives to ensure the stability of the base layer 100 and improve the structural consistency of the test strip. For example, the adhesive can be medical waterproof double-sided tape, with a width of 5 mm.
[0090] Understandably, the absorbent layer 400 can completely overlap with the base layer 100, and the shape and size of the absorbent layer 400 can be the same as those of the base layer 100. That is to say, the shape of the absorbent layer 400 can be rectangular, and the length and width of the absorbent layer 400 can be 4.5 cm and 2.5 cm, respectively.
[0091] In a specific implementation, the test strip also includes a water-proof layer 500, which is disposed between the absorbent layer 400 and the connecting layer 200.
[0092] The waterproof layer 500 is bonded to the central region of the adhesive side of the connecting layer 200. The waterproof layer 500 is used to prevent the liquid of the test sample absorbed by the absorbent layer 400 from leaking out of the test paper.
[0093] For example, the waterproof layer 500 may be made of silicone paper material, and the thickness of the waterproof layer 500 may be 0.1 mm.
[0094] In some examples, the periphery of the waterproof layer 500 is bonded to the periphery of the absorbent layer 400 using adhesives to improve the structural consistency and stability of the test strip. For example, the adhesive can be medical waterproof double-sided tape, with a width of 5 mm.
[0095] Understandably, the waterproof layer 500 and the absorbent layer 400 can completely overlap. The shape and size of the waterproof layer 500 are the same as those of the base layer 100. That is to say, the shape of the waterproof layer 500 can be rectangular, and the length and width of the waterproof layer 500 can be 4.5 cm and 2.5 cm, respectively.
[0096] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.
[0097] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0098] Unless otherwise stated, the term "multiple" means two or more.
[0099] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the scope of this application is limited only by the appended claims.
Claims
1. A test strip, characterized in that, include: The base layer (100), and the nitrite detection unit (110), borax detection unit (120) and pesticide detection unit (130) are spaced apart on the base layer (100). The nitrite detection unit (110) has a nitrite detection solution for detecting nitrite, the borax detection unit (120) has a borax detection solution for detecting borax, and the pesticide detection unit (130) has a pesticide detection solution for detecting pesticides.
2. The test strip according to claim 1, characterized in that, The nitrite detection solution includes several of the following: p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride, chitosan, and disodium citrate-hydrogen phosphate.
3. The test strip according to claim 2, characterized in that, In the nitrite detection solution, the mass ratio of p-aminobenzenesulfonic acid, m-phenylenediamine hydrochloride and chitosan is (0~20):(10~30):(1~4).
4. The test strip according to claim 1, characterized in that, The borax detection solution includes several of the following: sodium hydroxymethyl cellulose, curcumin, 3,3',5,5'-tetramethylbenzidine, and disodium citrate-hydrogen phosphate.
5. The test strip according to claim 4, characterized in that, In the borax detection solution, the mass ratio of sodium hydroxymethyl cellulose, curcumin and 3,3',5,5'-tetramethylbenzidine is (1~5):(1~20):(0~4).
6. The test strip according to claim 1, characterized in that, The pesticide detection solution includes several of the following: 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, acetylcholinesterase, acetylthiocholine chloride, and disodium citrate-hydrogen phosphate.
7. The test strip according to claim 6, characterized in that, In the pesticide detection solution, the molar ratio of 5,5'-dithiobis(2-nitrobenzoic acid), sodium alginate, ammonium chloride, and acetylthiocholine chloride is (50~140):(1~10):(0~30):(10~40).
8. The test strip according to any one of claims 1-7, characterized in that, It also includes a pesticide detection control unit (140), which is disposed on the base layer (100) and disposed on one side of the pesticide detection unit (130).
9. The test strip according to any one of claims 1-7, characterized in that, It also includes a connecting layer (200) and a protective layer (300), wherein the base layer (100) is disposed on the connecting layer (200), and the protective layer (300) is disposed on the base layer (100) and detachably connected to the connecting layer (200); The nitrite detection unit (110), the borax detection unit (120), and the pesticide detection unit (130) are spaced apart on one side of the base layer (100) facing the protective layer (300).
10. The test strip according to claim 9, characterized in that, The connecting layer (200) has an adhesive portion, and the protective layer (300) is bonded to the adhesive portion.
11. The test strip according to claim 9, characterized in that, The base layer (100) has at least three spaced mounting parts, and the nitrite detection unit (110), the borax detection unit (120) and the pesticide detection unit (130) are connected to the mounting parts respectively.
12. The test strip according to claim 11, characterized in that, The mounting part is a mounting hole, and the nitrite detection unit (110), the borax detection unit (120) and the pesticide detection unit (130) are respectively embedded in the mounting hole.
13. The test strip according to claim 12, characterized in that, It also includes an absorption layer (400) disposed between the base layer (100) and the connecting layer (200).
14. The test strip according to claim 13, characterized in that, It also includes a waterproof layer (500) disposed between the absorbent layer (400) and the connecting layer (200).