Test paper roll for automatically testing water quality indicator

Abstract

The present application provides a test paper roll for automatically testing a water quality indicator. The test paper roll for automatically testing a water quality indicator comprises a base film; repeated-testing units are arranged on one side of the base film; each of the repeated-testing units comprises at least one test block, and the test block is fixedly connected to the base film; the repeated-testing units are covered with a surface cover film. The test paper roll for automatically testing a water quality indicator, in combination with a transmission device and color recognition technology, achieves fully automatic test paper-based periodic testing of water, thereby saving labor costs.

Description

An automatic water quality indicator test strip roll Technical Field

[0001] This invention belongs to the field of test strips and relates to an automatic test strip roll for water quality indicators. Background Technology

[0002] Test strip testing technology is a commonly used semi-quantitative testing technique in water quality analysis. By comparing the color change of the indicator in the test strip with a standard color card, semi-quantitative detection of water quality indicators can be achieved.

[0003] The characteristics of test strip testing technology are: it is suitable for on-site testing of various clean water qualities, the operation is very simple, the testing time is short, and there is no technical threshold for testing personnel; the test strips are easy to carry, do not require testing personnel to come into contact with additional chemicals and reagents, and have high safety; the testing cost is much lower than other testing methods, but it can only be used as a semi-quantitative testing method and cannot obtain very accurate test index data.

[0004] Many industries and sectors require regular, periodic testing of water quality indicators to monitor various aspects of water quality. In most cases, the precision required is not as high as in drinking water testing, making test strips a very suitable method, such as in public swimming pools and hot springs.

[0005] Test strips can detect many water quality indicators. Commercially available multi-indicator test strips can be attached side by side to a narrow strip of film. When using them, all the test strips on the strip are immersed in the water to be tested at the same time, and then compared with a standard color chart to achieve simultaneous detection of multiple indicators. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this application provides an automatic water quality indicator test strip roll. This automatic water quality indicator test strip roll, combined with a transmission device and color recognition technology, achieves fully automated timed test strip detection, saving labor costs.

[0007] This application provides an automatic water quality indicator test strip roll, which includes a bottom film and a repeat detection unit is provided on one side of the bottom film;

[0008] The repeat detection unit includes at least one detection block, which is fixedly connected to the bottom membrane;

[0009] The repeat detection unit is covered with a surface coating.

[0010] As a preferred technical solution of the present invention, the number of repeatable detection units is not less than 10, such as 10, 20, 50, 100, 150, 200, 300, 500, 800, 1000, 1200, 1500, 1800 or 2000, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0011] As a preferred technical solution of this application, the number of repeatable detection units is 200 to 2000.

[0012] As a preferred technical solution of this application, the repeat detection units are arranged in parallel at equal intervals on one side of the bottom film.

[0013] As a preferred technical solution of this application, the spacing of the repeat detection units is 10 to 500 mm, such as 10 mm, 20 mm, 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm or 500 mm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0014] As a preferred technical solution of this application, the detection block is fixedly connected to the bottom film through the first adhesive layer.

[0015] As a preferred technical solution of this application, the repeat detection unit includes 1 to 20 detection blocks, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20, etc.

[0016] As a preferred technical solution of this application, when the repeat detection unit includes at least two detection blocks, the detection blocks are arranged in parallel with equal spacing.

[0017] As a preferred technical solution of this application, the spacing of the detection blocks is greater than 1mm, such as 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0018] As a preferred technical solution of this application, the detection indicators of the detection block in the repeatable detection unit include: pH, residual chlorine, total chlorine, chlorine dioxide, hardness, total bromine, total alkalinity, cyanuric acid, anion, heavy metal ions, ammonia nitrogen, glucose, ascorbic acid, EDTA, ozone or peroxide disinfectant, or any one or a combination of at least two of these.

[0019] As a preferred technical solution of this application, a positioning film is provided on one side of the detection block, and the positioning film is fixedly connected to the bottom film through a second adhesive layer.

[0020] As a preferred technical solution in this application, the surface coating is an electrostatic film.

[0021] As a preferred technical solution of this application, the thickness of the electrostatic film is 0.01 to 0.2 mm, such as 0.01 mm, 0.02 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm or 0.2 mm, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0022] The automatic water quality test strip provided in this application, by setting up a repeatable test unit with test blocks, can realize continuous and timed testing of multiple water quality indicators, saving labor costs.

[0023] The automatic water quality indicator test strips provided in this application can meet the testing needs of different automatic testing devices by adjusting the spacing of the repeat detection units; and can meet the testing needs of different water quality indicators by adjusting the types of detection blocks in the repeat detection units. It has a wide range of applications and is suitable for various water quality testing scenarios. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their descriptions, serve to explain the invention and do not constitute an undue limitation thereof. Wherein:

[0025] Figure 1 is a top view of the structure of the automatic water quality index test strip roll provided in Embodiment 1 of this application;

[0026] Figure 2 is a cross-sectional view of the automatic water quality index test strip roll provided in Embodiment 1 of this application;

[0027] Figure 3 is a top view of the structure of the automatic water quality index test strip roll provided in Embodiment 7 of this application;

[0028] Figure 4 is a cross-sectional view of the automatic water quality index test strip roll provided in Embodiment 7 of this application;

[0029] Figure 5 is a top view of the structure of the automatic water quality index test strip roll provided in Embodiment 8 of this application;

[0030] Figure 6 is a cross-sectional view of the structure of the automatic water quality index test strip roll provided in Embodiment 8 of this application.

[0031] Illustration:

[0032] Among them, 1-surface coating; 2-repeated detection unit; 21-positioning membrane; 22-detection block; 23-adhesive layer; 3-bottom membrane. Detailed Implementation

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] The technical solution of this application will be further described below through specific implementation methods.

[0035] This application provides an automatic water quality indicator test strip roll, which includes a bottom film and a repeat detection unit is provided on one side of the bottom film;

[0036] The repeat detection unit includes at least one detection block, which is fixedly connected to the bottom membrane;

[0037] The repeat detection unit is covered with a surface coating.

[0038] In this application, the automatic water quality indicator test strip includes several repeatable testing units for periodically testing water quality indicators. The types of test blocks in the repeatable testing units can be adjusted according to requirements, and the testing cycle can be adjusted based on the number of repeatable testing units. The automatic water quality indicator test strip can be used in conjunction with a transmission device and color recognition technology. The transmission device delivers the automatic water quality indicator test strip to the dripping assembly of the automatic testing device. The repeatable testing units can test the water quality indicators at the required testing time. After testing, color recognition technology is used for automatic colorimetric comparison to obtain the test results. This automates the periodic repeated testing of water quality, reduces labor costs, minimizes errors introduced by manual testing, and improves testing accuracy.

[0039] In one specific embodiment of this application, the number of repeatable detection units in the automatic water quality indicator test strip is not less than 10, preferably 200 to 2000; however, it is not limited to the above values, and the number of repeatable detection units in each automatic water quality indicator test strip can be adjusted according to testing and production needs.

[0040] In this application, since the automatic water quality index test strip rolls need to be used with automated equipment, in order to meet the needs of long-term, multi-batch automatic testing without maintenance, the number of repeatable testing units needs to be a certain, but not too many, otherwise the volume and weight of the test strip rolls will be too large. Therefore, the preferred number of repeatable testing units is 200 to 2000.

[0041] In one specific embodiment of this application, the spacing between the repeat detection units is 10 to 500 mm, preferably 30 to 100 mm; however, it is not limited to the above values, and the spacing between the repeat detection units can be adjusted according to the specifications of the transmission device.

[0042] In one specific embodiment of this application, the detection indicators of the test block include: pH, residual chlorine, total chlorine, chlorine dioxide, hardness, total bromine, total alkalinity, cyanuric acid, anions, heavy metal ions, ammonia nitrogen, glucose, ascorbic acid, EDTA, ozone, or a combination of at least two of peroxide disinfectants. Anions may include any one or a combination of at least two of nitrate, chloride, nitrite, phosphate, carbonate, sulfate, and sulfite. Heavy metal ions may include any one or a combination of at least two of copper, iron, nickel, cobalt, manganese, chromium, silver, zinc, lead, tin, and arsenic. Peroxide disinfectants include any one or a combination of at least two of hydrogen peroxide, peracetic acid, and other peroxides. Other water quality indicators not listed herein that can be detected by test strips may also be included in the detection indicators of the test block. It should also be noted that the detection indicators listed above, such as anions, heavy metal ions, and peroxide disinfectants, are general descriptions of the types of detection. The test block can detect one or more of the above-mentioned indicators according to the needs of water body testing, and does not test all of the above-mentioned types of indicators.

[0043] In one specific embodiment of this application, the number of detection blocks in the repeat detection unit can be 1 to 20, preferably 1 to 7. However, it is not limited to the above values ​​and can be adjusted according to the number of water quality indicators to be detected as needed.

[0044] In one specific embodiment of this application, the detection indicators of each detection block in the same repeat detection unit can be the same or different. Identical detection blocks can be considered as repeated detections of the corresponding indicator, thereby reducing detection errors. Different detection blocks, on the other hand, simultaneously detect different water quality indicators to comprehensively assess the water quality.

[0045] In one specific embodiment of this application, the detection block consists of a substrate and a detection reagent loaded on the substrate. The substrate can be filter paper, absorbent cotton paper, synthetic fiber, or other absorbent materials. The detection reagent is a chemical indicator commonly used in water quality testing, and is not specifically limited here.

[0046] In one specific embodiment of this application, the spacing between the detection blocks is greater than 1 mm to avoid mutual interference between the detection reagents in adjacent detection blocks.

[0047] In one specific embodiment of this application, the length and width of the detection block can be independently 1 to 10 mm, preferably 5 to 7 mm; preferably square; the thickness can be 0.05 to 2 mm, preferably 0.15 to 0.8 mm.

[0048] In one specific embodiment of this application, the thickness of the positioning film can be 0.05 to 0.3 mm, and the width of the positioning film is smaller than the width of the surface coating.

[0049] In one specific embodiment of this application, the material of the positioning membrane can be selected according to the requirements of waterproofing and flexibility, and no specific limitation is made here.

[0050] In one specific embodiment of this application, the base film is preferably a flexible film material with a thickness of 0.05–0.3 mm. More preferably, the base film is a PET film with a thickness of 0.07–0.1 mm. The width of the base film is not less than the width of the surface coating.

[0051] In one specific embodiment of this application, the detection block is fixedly connected to the base film via a first adhesive layer.

[0052] In one specific embodiment of this application, a positioning film is provided on one side of the detection block, and the positioning film is fixedly connected to the bottom film through a second adhesive layer.

[0053] In one specific embodiment of this application, the thickness and material of the first adhesive layer and the second adhesive layer can be selected according to the needs of bonding and waterproofing, and are not specifically limited here.

[0054] In one specific embodiment of this application, the surface coating is an electrostatic film with a thickness of 0.01 to 0.2 mm.

[0055] In this application, the detection block achieves color change through an indicator contained within it. However, the test strip itself has a strong water absorption capacity and can also absorb moisture from the air. If the test strip has absorbed a certain amount of moisture, oxygen, or carbon dioxide from the air before testing, it will lead to incorrect test results or even cause the test strip to become ineffective. Therefore, when the test strip roll is not in use, it needs to be protected against moisture. Thus, a surface film is covered on the automatic water quality indicator test strip roll as a protective film, so that the inside of the test strip roll can be isolated from air as much as possible when not in use, preventing or slowing down the contact between moisture in the air and the test strip; when the test strip needs to be used, the surface film can be torn off immediately.

[0056] The selection of the surface coating needs to consider the following: First, the surface coating and the base film should adhere tightly, especially when rolled up and bent, to prevent external air and moisture from contacting the test strip along the edges of the roll. Second, after the surface coating is torn, no chemicals should transfer to the test strip, causing contamination. Third, the coating needs to have sufficient mechanical strength; since tearing the test strip roll requires mechanical operation, the coating cannot be torn or significantly stretched, otherwise it will affect subsequent testing. Considering all these factors, using an electrostatic film of a certain thickness can meet these requirements.

[0057] In one specific embodiment of this application, the method for preparing an automatic water quality indicator test strip includes:

[0058] Apply the first adhesive layer to one side of the test strip roll and cut it to the required width;

[0059] Arrange the cut test strip rolls in the required order and spacing, and paste them onto the surface of the positioning film. A second adhesive layer is then pasted onto the other side of the positioning film.

[0060] Using asynchronous die-cutting and bonding technology, the test strip roll with positioning film is cut into repeatable test units according to the requirements through die-cutting process, and the repeatable test units are asynchronously bonded to the bottom film according to the required spacing to obtain the test strip roll.

[0061] A surface coating is laminated onto the surface of the test paper roll to obtain a test paper roll with a surface coating;

[0062] The test paper roll with surface coating is divided into automatic test paper rolls for water quality indicators according to a specified length or a specified number of structural units.

[0063] To better illustrate this application and facilitate understanding of its technical solutions, typical but non-limiting embodiments of this application are as follows:

[0064] Example 1

[0065] This embodiment provides an automatic water quality indicator test strip roll, the structure of which is shown in Figures 1 and 2. It includes a bottom film 3, which is a PET film with a thickness of 0.05 mm; repeat detection units 2 are arranged in parallel at equal intervals on one side of the bottom film 3, the number of repeat detection units 2 is 2000, and the spacing between the repeat detection units 2 is 50 mm.

[0066] Each repeat detection unit 2 includes 3 detection blocks 22. A positioning membrane 21 is provided on one side of the detection block 22. The detection block 22 is fixedly connected to the positioning membrane 21 through an adhesive layer 23. The positioning membrane 21 is fixedly connected to the bottom membrane 2 through an adhesive layer 23.

[0067] The detection block 22 is 1 mm long and 1 mm wide, and 0.05 mm thick. The spacing between adjacent detection blocks 22 is 2 mm. The detection blocks 22 are used to detect pH, residual chlorine and alkalinity respectively. The positioning membrane 21 is 0.05 mm thick.

[0068] The repeat detection unit 2 is covered with a surface coating 1, which is an electrostatic film with a thickness of 0.05 mm.

[0069] Example 2

[0070] This embodiment provides an automatic water quality indicator test strip roll, including a base film 3, which is a PET film with a thickness of 0.1mm; repeat detection units 2 are arranged parallel to each other at equal intervals on one side of the base film 3, the number of repeat detection units 2 is 200, and the spacing between the repeat detection units 2 is 500mm.

[0071] Each repeat detection unit 2 includes 3 detection blocks 22. A positioning membrane 21 is provided on one side of the detection block 22. The detection block 22 is fixedly connected to the positioning membrane 21 through an adhesive layer 23. The positioning membrane 21 is fixedly connected to the bottom membrane 2 through an adhesive layer 23.

[0072] The detection block 22 is 10mm long and 10mm wide, and 2mm thick. The spacing between adjacent detection blocks 22 is 10mm. The detection blocks 22 are used to detect pH, total chlorine and alkalinity respectively. The positioning membrane 21 is 0.3mm thick.

[0073] The repeat detection unit 2 is covered with a surface coating 1, which is an electrostatic film with a thickness of 0.2 mm.

[0074] Example 3

[0075] This embodiment provides an automatic water quality indicator test strip roll, including a base film 3, which is a PET film with a thickness of 3mm; repeat detection units 2 are arranged parallel to each other at equal intervals on one side of the base film 3, the number of repeat detection units 2 is 300, and the spacing between the repeat detection units 2 is 100mm.

[0076] Each repeat detection unit 2 includes 3 detection blocks 22. A positioning membrane 21 is provided on one side of the detection block 22. The detection block 22 is fixedly connected to the positioning membrane 21 through an adhesive layer 23. The positioning membrane 21 is fixedly connected to the bottom membrane 2 through an adhesive layer 23.

[0077] The detection block 22 is 5mm long and 5mm wide, and 0.15mm thick. The spacing between adjacent detection blocks 22 is 5mm. The detection blocks 22 are used to detect pH, total bromine and total hardness respectively; the positioning membrane 21 is 0.1mm thick.

[0078] The repeat detection unit 2 is covered with a surface coating 1, which is an electrostatic film with a thickness of 0.01 mm.

[0079] Example 4

[0080] This embodiment provides an automatic water quality indicator test strip roll, including a base film 3, which is a PET film with a thickness of 0.1mm; repeat detection units 2 are arranged parallel to each other at equal intervals on one side of the base film 3, the number of repeat detection units 2 is 500, and the spacing between the repeat detection units 2 is 10mm.

[0081] Each repeat detection unit 2 includes 3 detection blocks 22. A positioning membrane 21 is provided on one side of the detection block 22. The detection block 22 is fixedly connected to the positioning membrane 21 through an adhesive layer 23. The positioning membrane 21 is fixedly connected to the bottom membrane 2 through an adhesive layer 23.

[0082] The detection block 22 is 7mm long and 7mm wide, and 0.8mm thick. The spacing between adjacent detection blocks 22 is 7mm. The detection blocks 22 are used to detect cyanuric acid, hardness and copper respectively; the positioning film 21 is 0.2mm thick.

[0083] The repeat detection unit 2 is covered with a surface coating 1, which is an electrostatic film with a thickness of 0.1 mm.

[0084] Example 5

[0085] This embodiment provides an automatic test strip for water quality indicators. Except that each repeat detection unit 2 includes one detection block 22, which is used to detect pH, the other conditions are the same as in embodiment 4.

[0086] Example 6

[0087] This embodiment provides an automatic water quality indicator test strip. Except that each repeat detection unit 2 includes 7 detection blocks 22, which are used to detect pH, hardness, iron ions, copper ions, chloride ions, sulfate ions and ammonia nitrogen respectively, the other conditions are the same as in embodiment 4.

[0088] Example 7

[0089] This embodiment provides an automatic water quality indicator test strip roll, the structure of which is shown in Figures 3 and 4. It includes a bottom film 3, which is a PET film with a thickness of 0.1 mm; repeat detection units 2 are arranged parallel to each other at equal intervals on one side of the bottom film 3, the number of repeat detection units 2 is 500, and the spacing between the repeat detection units 2 is 50 mm.

[0090] Each repeatable detection unit 2 includes 3 detection blocks 22, and the detection blocks 22 are fixedly connected to the bottom film 3 through an adhesive layer 23;

[0091] The detection block 22 is 7mm long and 7mm wide, and 0.8mm thick. The spacing between adjacent detection blocks 22 is 7mm. The detection blocks 22 are used to detect phosphate ions, nitrate ions and carbonate ions respectively. The positioning membrane 21 is 0.2mm thick.

[0092] The repeat detection unit 2 is covered with a surface coating 1, which is an electrostatic film with a thickness of 0.1 mm.

[0093] Example 8

[0094] This embodiment provides an automatic water quality indicator test strip roll, the structure of which is shown in Figures 5 and 6. Its positioning film 21 is perpendicular to the arrangement direction of the detection blocks 22 in each repeat detection unit 2 and extends along the test strip roll. The number of positioning films 21 is the same as the number of detection blocks 22 in each repeat detection unit 2. Each positioning film 21 connects the detection blocks 22 in the same column in each repeat detection unit 2. Except for the above conditions, the other conditions are the same as in Embodiment 1.

[0095] In Examples 1-8, the positioning film 21 is made of PET, and the polymer film is black for easy color recognition; in Examples 1-8, the electrostatic film is made of PE, and the adhesive layer 23 is double-sided adhesive.

[0096] The detection range of the wide pH test strip is 0–14.

[0097] One type of precision pH test strip has a detection range of 6.2 to 9.0, and its color gradually changes from yellow to purplish-red.

[0098] The detection range of residual chlorine test paper is 0-10 mg / L, and the color gradually changes from white to blue.

[0099] The detection range of total chlorine test paper is 0-10 mg / L, and the color gradually changes from white to purplish-red.

[0100] The total bromine test paper has a detection range of 0–20 mg / L, and the color gradually changes from white to blue.

[0101] The hardness test strip has a detection range of 0–1000 mg / L, and its color gradually changes from green to orange.

[0102] The alkalinity test strip has a detection range of 0–240 mg / L, and its color gradually changes from yellow to blue-green.

[0103] The detection range of cyanuric acid test strips is 0–200 mg / L, and the color gradually changes from orange-yellow to red.

[0104] The detection range of nitrate ion test paper is 0-500 mg / L, and the color gradually changes from white to pink.

[0105] The detection range of chloride ion test strips is 0–3000 mg / L, and the color gradually changes from reddish-brown to yellow.

[0106] The detection range of nitrite ion test paper is 0-80 mg / L, and the color gradually changes from white to red.

[0107] The detection range of phosphate ion test paper is 0-500 mg / L, and the color gradually changes from white to dark blue.

[0108] The detection range of sulfate ion test paper is 0–1600 mg / L, and the color gradually changes from orange to yellow.

[0109] The detection range of sulfite ion test paper is 0–1000 mg / L, and the color gradually changes from white to orange.

[0110] The detection range of iron test paper is 0-1 mg / L, and the color gradually changes from white to cyan.

[0111] The detection range of copper test paper is 0-5 mg / L, and the color gradually changes from white to purple.

[0112] The detection range of arsenic test strips is 0–0.5 mg / L, and the color gradually changes from white to yellow to brownish-black.

[0113] The detection range for hydrogen peroxide is 0–25 mg / L, and its color gradually changes from white to blue-green.

[0114] The detection range of ammonia nitrogen test strips is 0–6 mg / L, and the color gradually changes from pale yellow to blue-green.

[0115] Using the automatic water quality indicator test strip provided in Example 1, the water quality indicators of a swimming pool were tested from 6:00 to 20:00. The test strip was assembled in the transmission device and set to test once every two hours. The display color of the detection block 22 was obtained through color recognition technology, and the test results were obtained through algorithm analysis, as shown in Table 1.

[0116] Table 1 shows the results of water quality testing using the test strips provided in Example 1.

[0117] Using the automatic water quality indicator test strip provided in Example 6, the water quality indicators of a certain industrial circulating water were tested. The testing period was from 8:00 to 15:00. The test strip was assembled in the transmission device, and the testing interval was set to 1 hour. The display color of the detection block 22 was obtained through color recognition technology, and the test results were obtained through algorithm analysis, as shown in Table 2. In Table 2, except for pH, the unit of all indicators is mg / L.

[0118] Table 2 shows the results of water quality testing using the test strips provided in Example 6.

[0119] The present invention has been illustrated with the above embodiments to illustrate its detailed structural features. However, the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. An automatic water quality indicator test strip roll, characterized in that, The automatic water quality indicator test strip includes a base film, and a repeat detection unit is provided on one side of the base film; The repeat detection unit includes at least one detection block, which is fixedly connected to the bottom membrane; The repeat detection unit is covered with a surface coating.

2. The automatic water quality indicator test strip according to claim 1, characterized in that, The number of repeat detection units is not less than 10.

3. The automatic water quality indicator test strip roll according to claim 2, characterized in that, The number of repeat detection units is 200 to 2000.

4. The automatic water quality indicator test strip roll according to claim 1, characterized in that, The repeat detection units are arranged parallel to each other at equal intervals on one side of the bottom membrane.

5. The automatic water quality indicator test strip roll according to claim 4, characterized in that, The spacing between the repeat detection units is 10–500 mm.

6. The automatic water quality indicator test strip roll according to claim 1, characterized in that, The detection block is fixedly connected to the base film through a first adhesive layer.

7. The automatic water quality indicator test strip according to claim 1, characterized in that, The repeat detection unit includes 1 to 20 detection blocks.

8. The automatic water quality indicator test strip roll according to claim 1, characterized in that, When the repeat detection unit includes at least two detection blocks, the detection blocks are arranged in parallel with equal spacing.

9. The automatic water quality indicator test strip roll according to claim 8, characterized in that, The spacing between the detection blocks is greater than 1 mm.

10. The automatic water quality indicator test strip roll according to claim 1, characterized in that, The detection indicators of the detection blocks in the repeat detection unit include: pH, residual chlorine, total chlorine, chlorine dioxide, hardness, total bromine, total alkalinity, cyanuric acid, anions, heavy metal ions, ammonia nitrogen, glucose, ascorbic acid, EDTA, ozone, or any one or a combination of at least two of the peroxide disinfectants.

11. The automatic water quality indicator test strip roll according to claim 1, characterized in that, A positioning film is provided on one side of the detection block, and the positioning film is fixedly connected to the bottom film through a second adhesive layer.

12. The automatic water quality indicator test strip according to claim 1, characterized in that, The surface coating is an electrostatic film.

13. The automatic water quality indicator test strip roll according to claim 12, characterized in that, The thickness of the electrostatic film is 0.01 to 0.2 mm.

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