A kind of phthalaldehyde concentration detection test paper and preparation method thereof

A technology for detection of phthalaldehyde and test paper, applied in the field of chemical detection, can solve the problems of long time and complicated operation, and achieve the effect of short discoloration time, simple operation and obvious display

Active Publication Date: 2019-05-10
广西庆荣卫生消毒制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have certain limitations, such as the substantive examination patent titled a detection test paper for the concentration range of o-phthalaldehyde disinfectants, which involves the modification of paper, and the operation is relatively complicated; The test time required for the development and production of the actual patent examination of the test paper is 5-8 minutes, which is a long time

Method used

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  • A kind of phthalaldehyde concentration detection test paper and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 0.3g sodium bisulfite, 5g urea, 10g diammonium hydrogen phosphate, 5mL 0.4g / L methylene blue aqueous solution into 45mL deionized water to obtain a mother liquor with uniform color; Soak in ethanol and deionized water successively for 30 minutes, take it out and dry it at 50°C for later use; (3) Add the pretreated filter paper into the mother liquor, add 2mL of ethanol, and ultrasonically shake for 30 minutes, take out the filter paper, Dry to obtain the target filter paper with uniform color.

[0026] Fix the prepared filter paper on a non-absorbent substrate with double-sided tape to prepare the required target test paper.

[0027] Insert the fixed filter paper into the measured solution for 3 seconds, take it out, shake it dry, start timing, and read the color after 90 seconds.

[0028] figure 1 Respectively, when the concentration of o-phthalaldehyde is 0.1%, 0.2%, 0.3%, 0.4%, and 0.5%, the color development of the test paper after 90s. It can be seen th...

Embodiment 2

[0030] Add 0.3g of sodium bisulfite, 8g of urea, 10g of diammonium hydrogen phosphate and 5mL of 0.4g / L methylene blue solution into 45mL of deionized water and dissolve completely to obtain a mother liquor with uniform color; cut ordinary filter paper into small squares of 1cm×1cm, Soak in ethanol and deionized water successively for 30 minutes, take it out and dry it at 50°C for later use; (3) Add the pretreated filter paper into the mother liquor, then add 4mL of ethanol, ultrasonically shake for 20 minutes, take out the filter paper, and dry it at 50°C Dry to obtain the target filter paper with uniform color.

[0031] Fix the prepared filter paper on a non-absorbent substrate with double-sided tape to prepare the required target test paper.

Embodiment 3

[0033] Add 0.3g sodium bisulfite, 3g urea, 15g diammonium hydrogen phosphate and 5mL 0.4g / L methylene blue solution into 45mL deionized water to dissolve completely to obtain a mother liquor with uniform color; cut ordinary filter paper into small squares of 1cm×1cm, Soak in ethanol and deionized water successively for 30 minutes, take it out and dry it at 50°C for later use; (3) Add the pretreated filter paper into the mother liquor, then add 3mL of ethanol, ultrasonically shake for 30 minutes, take out the filter paper, and put it at 50°C Dry to obtain the target filter paper with uniform color.

[0034] Fix the prepared filter paper on a non-absorbent substrate with double-sided tape to prepare the required target test paper.

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Abstract

The invention relates to test paper for detecting the concentration of phthalic dicarboxaldehyde and a method for preparing the test paper. The method for preparing the test paper includes three portions of preparing mother liquor; pretreating filter paper; soaking and dyeing the filter paper. A color development principle for the filter paper includes that a certain quantity of solution can be adsorbed by the filter paper after the filter paper is quickly in contact with phthalic dicarboxaldehyde solution, all the phthalic dicarboxaldehyde adsorbed on the filter paper can be consumed by sodium hydrosulfite on the filter paper if the concentration of the phthalic dicarboxaldehyde is lower than a specified threshold (0.35%), and only a natural color (light blue) is presented; parts of the phthalic dicarboxaldehyde are consumed by the sodium hydrosulfite on the filter paper if the concentration of the phthalic dicarboxaldehyde reaches the specified threshold, quick reaction can be carried out on the remaining phthalic dicarboxaldehyde and a color developing agent (urea) on the test paper under the effect of a color development accelerator (diammonium phosphate), yellow can be presented, and yellow green can be presented after the yellow and the natural color (the light blue) of the test paper are overlaid on each other. The test paper and the method have the advantages that detection processes implemented by the aid of the test paper are easy and convenient to use, and accurate and reliable results can be obtained.

Description

technical field [0001] The invention relates to the field of chemical detection, in particular to a test paper for detecting the concentration of a disinfectant containing o-phthalaldehyde and a preparation method thereof. Background technique [0002] As a new type of medical disinfectant, o-phthalaldehyde must have a concentration greater than 0.35% in order to ensure the effect of disinfection. At present, the methods for detecting the content of o-phthalaldehyde mainly include chemical titration, ultraviolet spectrophotometer and high performance liquid phase analysis. However, these methods all have the disadvantages of cumbersome and complicated operation and a long time, and are not suitable for monitoring and using by medical staff during the disinfection process. [0003] The concentration test card of o-phthalaldehyde has entered the field of vision of researchers as a method that can directly and quickly measure the concentration. Such as Chinese patent CN 20131...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 彭磊汪欣秦殷陈国雄
Owner 广西庆荣卫生消毒制品有限公司
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