A test card for phthalaldehyde concentration and pH value

Abstract

A kind of o-phthaldehyde concentration and pH test card, including two-item detection area, colorimetric chart and substrate, it is characterized in that, substrate includes handle and bearing plate, two-item detection area is set to the right side of bearing plate, colorimetric chart is set to the left side of bearing plate, two-item detection area includes o-phthaldehyde concentration detection area and pH detection area, o-phthaldehyde concentration detection area is fixedly provided with thickening high-quality filter paper, pH detection area is fixedly provided with high-purity fiber filter paper, the style of colorimetric chart is set to 3 rows * 4 columns chart style, o-phthaldehyde concentration colorimetric block transverse and pH colorimetric block longitudinal cross 6 corresponding with " qualified " and " unqualified " word and color identification cell, protection unit includes protective film and seal bag, one side of protective film is provided with peeling tongue, the front end of seal bag is provided with self-sealing strip.Effectively solved the problems such as cannot use two-item detection area, cannot use colorimetric chart and cannot use protection unit.

Description

Technical Field

[0001] This utility model relates to the field of chemical detection technology, and in particular to a test card for orthophthalaldehyde concentration and pH value. Background Technology

[0002] Phthalate, as a highly effective disinfectant, has been widely used in the disinfection of precision medical instruments such as endoscopes and food processing equipment due to its excellent bactericidal effect and relatively environmentally friendly characteristics. The disinfection effect of phthalate requires maintaining a concentration within the range of 0.3%-0.5%, with an optimal pH range of 4.0-6.0. If the concentration is too low, disinfection will be incomplete; if it is too high, it may produce irritating residues. A pH value deviating from the optimal range will cause phthalate to degrade and become ineffective. Therefore, there is an urgent need for a tool for on-site detection of both phthalate concentration and pH value. However, existing phthalate concentration detection tools cannot use dual detection areas and cannot simultaneously detect phthalate concentration and pH value on-site using a single test card. The system lacks several limitations. It cannot simplify the operation process while comprehensively assessing the effectiveness of phthalic acid disinfectant. It cannot use colorimetric charts, nor can it directly compare the thickened high-quality filter paper with the phthalic acid concentration colorimetric block, or the high-purity fiber filter paper with the pH colorimetric block, thus failing to improve the accuracy of the comparison. Furthermore, the design of the colorimetric chart cannot more intuitively reflect the effectiveness of the phthalic acid disinfectant. It also cannot use a protective unit, making it impossible to easily peel off the protective film pasted on the thickened high-quality filter paper and the high-purity fiber filter paper using a peeling tongue. Finally, it cannot seal and store the device after testing, hindering subsequent viewing and traceability.

[0003] Patent No. ZL202411283006.4 discloses a "phthalaldehyde disinfectant concentration test strip". This invention includes a bottom layer made of hydrophobic material; a microfluidic layer on the bottom layer, divided into multiple functional areas by hydrophobic boundaries; a smart response detection layer on the microfluidic layer, comprising temperature-responsive hydrogel microspheres and a signal enhancer; a self-calibration layer on the microfluidic layer; a sample input end at one end of the test strip, with an absorbent layer; and a color-changing indicator element located above the smart response detection layer, the self-calibration layer, and the integrated colorimetric card. In use, the sample is added to the input area, activated by ultraviolet light, and after the reaction is complete, the result can be obtained through visual comparison or scanning with a smart device. This invention has advantages such as high sensitivity, strong specificity, simple operation, rapid detection, and accurate results, and is suitable for rapid detection of phthalaldehyde concentration in multiple fields such as medical and health care, food safety, and environmental monitoring. Summary of the Invention

[0004] In view of this, the present invention provides a phthalaldehyde concentration and pH value test card to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0005] The technical solution of this utility model is implemented as follows: The aforementioned phthalaldehyde concentration and pH value test card includes a dual detection area, a colorimetric chart, and a substrate, characterized in that... The substrate includes a handle and a support plate, with the middle position of one end of the support plate connected to the handle, and the substrate is configured as an integrally formed structure; The dual-detection area includes a phthalaldehyde concentration detection area and a pH value detection area. The dual-detection area is located in the middle of the right side of the support plate. The phthalaldehyde concentration detection area is located on the upper side of the dual-detection area, and the pH value detection area is located on the lower side of the dual-detection area. The phthalaldehyde concentration detection area is fixedly equipped with thickened high-quality filter paper, and the pH value detection area is fixedly equipped with high-purity fiber filter paper. The phthalaldehyde concentration detection area, the thickened high-quality filter paper, the pH value detection area, and the high-purity fiber filter paper are all the same size. The colorimetric chart is located in the middle of the left side of the support plate. The colorimetric chart is set to a 3-row * 4-column chart style. The last column of the colorimetric chart has phthalic acid concentration colorimetric blocks arranged in an orderly manner, and the last row of the colorimetric chart has pH value colorimetric blocks arranged in an orderly manner. There are 6 cells where the phthalic acid concentration colorimetric blocks and the pH value colorimetric blocks intersect horizontally and vertically. The cells are marked with "Qualified" and "Unqualified" labels respectively. The cells marked with "Qualified" are set to green, and the cells marked with "Unqualified" are set to red.

[0006] It also includes a protective unit, which comprises a protective film and a sealing bag. A peeling tongue is provided on one side of the protective film. The protective film and the peeling tongue are integrally formed. The size of the protective film matches the size of the thickened high-quality filter paper. The protective film is respectively adhered to the upper end of the thickened high-quality filter paper and the high-purity fiber filter paper. A self-sealing strip is provided at the front end of the sealing bag. The size of the sealing bag matches the size of the substrate. The sealing bag is used to seal and preserve the test card after use, thereby extending the storage time.

[0007] The thickened high-quality filter paper is fully impregnated with histidine, mercaptoethanol, phosphate buffer solution and chitosan protective solution and then dried to achieve the purpose of accurately testing the concentration of phthalaldehyde. The high-purity fiber filter paper is thoroughly impregnated with phenol red, bromothymol blue, polyvinylpyrrolidone, ethanol, and purified water, and then dried to achieve accurate pH testing.

[0008] The substrate is made of PVC plastic. The protective film and sealing bag are made of transparent polyethylene. The phthalaldehyde concentration colorimetric block is printed on a preset position on the left side of the thickened high-quality filter paper using digital printing technology, and the pH value colorimetric block is printed on a preset position on the left side of the high-purity fiber filter paper using digital printing technology.

[0009] The beneficial effects of this utility model are: This invention features a dual-detection area, along with a corresponding support plate, thickened high-quality filter paper, and high-purity fiber filter paper. It enables simultaneous on-site detection of phthalic acid concentration and pH value using a single test card. The operation is simple and allows for a comprehensive assessment of the effectiveness of the phthalic acid disinfectant. This effectively solves the problems of not being able to use a dual-detection area, simultaneously detecting phthalic acid concentration and pH value using a single test card, and achieving both simple operation and a comprehensive assessment of the effectiveness of the phthalic acid disinfectant.

[0010] This invention features a colorimetric chart, a corresponding support plate, and dual detection areas, enabling direct comparison between thickened high-quality filter paper and phthalic acid concentration colorimetric blocks, as well as between high-purity fiber filter paper and pH value colorimetric blocks. This significantly improves the accuracy of the comparison. The colorimetric chart design provides a more intuitive reflection of the effective state of the phthalic acid disinfectant, effectively solving the problems of not being able to use colorimetric charts, thus hindering direct comparisons between thickened high-quality filter paper and phthalic acid concentration colorimetric blocks, high-purity fiber filter paper and pH value colorimetric blocks, and thus failing to improve comparison accuracy and provide a more intuitive reflection of the effective state of the phthalic acid disinfectant.

[0011] This invention features a protective unit, along with a corresponding substrate, thickened high-quality filter paper, and high-purity fiber filter paper. It allows for easy removal of the protective film adhered to the thickened high-quality filter paper and high-purity fiber filter paper using a peeling tab. After testing, the device can be sealed and stored for easy later inspection and traceability. This effectively solves the problems of not being able to use the protective unit, not being able to easily remove the protective film adhered to the thickened high-quality filter paper and high-purity fiber filter paper using a peeling tab, not being able to seal and store the device after testing, and not being able to facilitate later inspection and traceability. Attached Figure Description

[0012] Appendix Figure 1 This is a top view of the structure of this utility model; Appendix Figure 2 This is a front view structural diagram of this utility model.

[0013] Appendix Figure 3This is a top view schematic diagram of the sealing tape structure of this utility model.

[0014] Legend: 1. Dual-item detection area; 2. Colorimetric chart; 3. Substrate; 4. Handle; 5. Support plate; 6. Phthalate concentration detection area; 7. pH value detection area; 8. Thickened high-quality filter paper; 9. High-purity fiber filter paper; 10. Phthalate concentration colorimetric block; 11. pH value colorimetric block; 12. Cell; 13. "Pass" label; 14. "Fail" label; 15. Protective unit; 16. Protective film; 17. Sealing bag; 18. Peeling tongue; 19. Self-sealing strip. Detailed Implementation

[0015] Combination Figure 1 , Figure 2 , Figure 3 The present invention will be further described in detail with reference to the embodiments, so that the public can better understand the implementation method of the present invention. The specific implementation method of the present invention is as follows: The aforementioned phthalaldehyde concentration and pH value test card includes a dual detection area 1, a colorimetric chart 2, and a substrate 3, characterized in that... The substrate 3 includes a handle 4 and a support plate 5. The middle position of one end of the support plate 5 is connected to the handle 4. The substrate 3 is configured as an integrally formed structure. The dual-detection area 1 includes a phthalaldehyde concentration detection area 6 and a pH value detection area 7. The dual-detection area 1 is located in the middle of the right side of the support plate 5. The phthalaldehyde concentration detection area 6 is located on the upper side of the dual-detection area 1, and the pH value detection area 7 is located on the lower side of the dual-detection area 1. The phthalaldehyde concentration detection area 6 is fixedly equipped with a thickened high-quality filter paper 8, and the pH value detection area 7 is fixedly equipped with a high-purity fiber filter paper 9. The phthalaldehyde concentration detection area 6, the thickened high-quality filter paper 8, the pH value detection area 7, and the high-purity fiber filter paper 9 are all of equal size. The dual-zone design of the phthalaldehyde concentration detection area 6 and the pH value detection area 7 of the dual-detection area 1 allows for the simultaneous on-site detection of phthalaldehyde concentration and pH value with a single test card. The operation steps are simple, and the effectiveness of the phthalaldehyde disinfectant can be comprehensively evaluated. The colorimetric chart 2 is positioned in the middle of the left side of the support plate 5. The colorimetric chart 2 is formatted as a 3-row x 4-column chart. The last column of the colorimetric chart 2 contains orderly arranged phthalaldehyde concentration colorimetric blocks 10, and the last row contains orderly arranged pH value colorimetric blocks 11. Six cells 12 intersect horizontally and vertically with the phthalaldehyde concentration colorimetric blocks 10 and pH value colorimetric blocks 11. Each cell 12 contains a corresponding "qualified" label 13 and a "unqualified" label 14. The cells 12 containing the "qualified" label 13... The color is set to green, and the cell 12 of the "Unqualified" label 14 is set to red. The last column of the phthalaldehyde concentration colorimetric block 10 is positioned so that the distance between the thickened high-quality filter paper 8 and the phthalaldehyde concentration colorimetric block 10 is close to zero. The last row of the pH colorimetric block 11 is positioned so that the distance between the high-purity fiber filter paper 9 and the pH colorimetric block 11 is close to zero, effectively improving the accuracy of the comparison. The design of the "Qualified" and "Unqualified" labels and the color-coded cell 12 more intuitively reflects the effective status of the phthalaldehyde disinfectant.

[0016] It also includes a protective unit 15, which includes a protective film 16 and a sealing bag 17. A peeling tongue 18 is provided on one side of the protective film 16. The protective film 16 and the peeling tongue 18 are integrally formed. The size of the protective film 16 matches the size of the thickened high-quality filter paper 8. The protective film 16 is respectively adhered to the upper end of the thickened high-quality filter paper 8 and the high-purity fiber filter paper 9. A self-sealing strip 19 is provided at the front end of the sealing bag 17. The size of the sealing bag 17 matches the size of the substrate 3. The sealing bag 17 is used to seal and preserve the test card after use, so as to extend the storage time.

[0017] The thickened high-quality filter paper 8 is fully impregnated with histidine, mercaptoethanol, phosphate buffer solution and chitosan protective solution and then dried to achieve the purpose of accurately testing the concentration of orthophthalaldehyde. The high-purity fiber filter paper 9 is subjected to thorough impregnation with phenol red, bromothymol blue, polyvinylpyrrolidone, ethanol, and purified water, followed by drying, to achieve accurate pH value testing.

[0018] The substrate 3 is made of PVC plastic. The protective film 16 and the sealing bag 17 are made of transparent polyethylene. The phthalaldehyde concentration colorimetric block 10 is printed on a preset position on the left side of the thickened high-quality filter paper 8 using digital printing technology, and the pH value colorimetric block 11 is printed on a preset position on the left side of the high-purity fiber filter paper 9 using digital printing technology. Specific Implementation

[0019] Medical staff at the endoscopy center of a hospital tested the effectiveness of phthalic acid disinfectant. They removed the intact phthalic acid concentration and pH test cards, checked for any abnormalities, and ensured that the two protective films 16 were tightly sealed and that the sealing bag 17 and its self-sealing strip 19 were intact. The staff opened the package, pinched the handle 4 to remove the test cards, placed them flat on the table, and then pinched the peeling tongue 18 to remove the protective films adhered to the thickened high-quality filter paper 8 and the high-purity fiber filter paper 9. 16. Remove the filter paper and use a dropper to draw an appropriate amount of the phthalaldehyde disinfectant solution to be tested. Add 1-2 drops to the thickened high-quality filter paper 8 and the high-purity fiber filter paper 9 respectively. The thickened high-quality filter paper 8 is fully impregnated with histidine, mercaptoethanol, phosphate buffer solution and chitosan protective solution and then dried to accurately test the concentration of phthalaldehyde. The high-purity fiber filter paper 9 is fully impregnated with phenol red, bromothymol blue, polyvinylpyrrolidone, ethanol and purified water and then dried to accurately test the pH value. After the prescribed settling time, medical staff compared the reacted thickened high-quality filter paper 8 with the phthalaldehyde concentration colorimetric block 10 at close range, and compared the reacted high-purity fiber filter paper 9 with the pH value colorimetric block 11 at close range. They compared the color blocks with the closest color in the phthalaldehyde concentration colorimetric block 10 and the pH value colorimetric block 11, and directly checked the cells 12 where the two cells intersected horizontally and vertically. If the color of cell 12 was green and marked with the word "qualified" 13, the phthalaldehyde disinfectant was directly judged to be qualified. If the color of cell 12 was red and marked with the word "unqualified" 14, the phthalaldehyde disinfectant was directly judged to be unqualified. The design of the "qualified" and "unqualified" words and color markings in cell 12 more intuitively reflects the effective status of the phthalaldehyde disinfectant. After the testing process is completed, medical staff put the used phthalic acid concentration and pH test cards into the sealing bag 17, and put a desiccant packet into the sealing tape 17, and seal it with the self-sealing strip 19 to facilitate the hospital's later inspection and traceability.

Claims

1. A phthalaldehyde concentration and pH value test card, comprising a dual detection area (1), a colorimetric chart (2), and a substrate (3), characterized in that: The substrate (3) includes a handle (4) and a support plate (5). The middle position of one end of the support plate (5) is connected to the handle (4). The substrate (3) is configured as an integrally formed structure. The dual detection area (1) includes a phthalaldehyde concentration detection area (6) and a pH value detection area (7). The dual detection area (1) is located in the middle of the right side of the support plate (5). The phthalaldehyde concentration detection area (6) is located on the upper side of the dual detection area (1). The pH value detection area (7) is located on the lower side of the dual detection area (1). The phthalaldehyde concentration detection area (6) is fixedly provided with thickened high-quality filter paper (8). The pH value detection area (7) is fixedly provided with high-purity fiber filter paper (9). The phthalaldehyde concentration detection area (6), the thickened high-quality filter paper (8), the pH value detection area (7) and the high-purity fiber filter paper (9) are all the same size. The colorimetric chart (2) is located in the middle of the left side of the support plate (5). The colorimetric chart (2) is set to a chart style of 3 rows * 4 columns. The last column of the colorimetric chart (2) is arranged with phthalaldehyde concentration colorimetric blocks (10) in an orderly manner. The last row of the colorimetric chart (2) is arranged with pH value colorimetric blocks (11) in an orderly manner. The phthalaldehyde concentration colorimetric blocks (10) and the pH value colorimetric blocks (11) intersect each other horizontally and vertically with 6 cells (12). The cells (12) are correspondingly set with "qualified" label (13) and "unqualified" label (14). The cell (12) of the "qualified" label (13) is set to green, and the cell (12) of the "unqualified" label (14) is set to red.

2. The phthalaldehyde concentration and pH value test card as described in claim 1, characterized in that, It also includes a protective unit (15), which includes a protective film (16) and a sealing bag (17). A peeling tongue (18) is provided on one side of the protective film (16). The protective film (16) and the peeling tongue (18) are integrally formed. The size of the protective film (16) matches the size of the thickened high-quality filter paper (8). The protective film (16) is respectively attached to the upper end of the thickened high-quality filter paper (8) and the high-purity fiber filter paper (9). A self-sealing strip (19) is provided at the front end of the sealing bag (17). The size of the sealing bag (17) matches the size of the substrate (3). The sealing bag (17) is used to seal and preserve the test card after use, so as to extend the retention time.

3. The phthalaldehyde concentration and pH value test card as described in claim 1, characterized in that, The thickened high-quality filter paper (8) is fully impregnated with histidine, mercaptoethanol, phosphate buffer solution and chitosan protective solution and then dried to achieve the purpose of accurately testing the concentration of phthalaldehyde. The high-purity fiber filter paper (9) is subjected to thorough impregnation with phenol red, bromothymol blue, polyvinylpyrrolidone, ethanol and purified water and then dried to achieve accurate pH testing.

4. The phthalaldehyde concentration and pH value test card as described in claim 1, characterized in that, The substrate (3) is made of PVC plastic; the phthalaldehyde concentration colorimetric block (10) is printed on the left side of the thickened high-quality filter paper (8) using digital printing technology; the pH value colorimetric block (11) is printed on the left side of the high-purity fiber filter paper (9) using digital printing technology.

5. A phthalaldehyde concentration and pH value test card as described in claim 2, characterized in that, The protective film (16) and the sealing bag (17) are made of transparent polyethylene.

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