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Test paper for detecting phthalic dicarboxaldehyde and preparation and detection methods of test paper

A technology of o-phthalaldehyde and detection method, which is applied in the direction of material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the inaccurate quantification of o-phthalaldehyde and the influence of indicators Problems such as color change, lightening of test paper color, etc., to achieve true and reliable test results, low dissolution rate, and accurate quantification

Active Publication Date: 2017-07-21
CHANGJIANGMAI MEDICINE SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two disadvantages of this type of test paper. One is that the pH value before and after the reaction will change with the pH value of the disinfectant itself, which will affect the color change of the indicator and cause inaccurate measurement; system, the test paper will not be able to detect o-phthalaldehyde at all
The disadvantage of this type of test paper is that some amino acid substances will quickly dissolve in the disinfectant solution when the solution to be tested is dipped, resulting in the loss of amino groups, resulting in a lighter color of the test paper, thus making the quantification of o-phthalaldehyde inaccurate

Method used

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  • Test paper for detecting phthalic dicarboxaldehyde and preparation and detection methods of test paper

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Effect test

Embodiment 1

[0042] Embodiment 1: the preparation (one) of o-phthalaldehyde disinfectant concentration detection test paper

[0043] Prepare the test paper for detecting the concentration of o-phthalaldehyde disinfectant according to the following steps.

[0044] 1. Preparation of plain paper: first prepare 0.5% fixative solution. Preparation method: Weigh 5g of carboxymethyl cellulose, dissolve it in deionized water, and dilute to 1000mL. Cut the filter paper into a size of 10cm×10cm, soak it in the solution, fully soak it, and dry it at 50°C.

[0045] 2. Preparation of solution A: Solution A contains 0.2% adsorbent, 0.5% color indicator, and 0.05% suspending and dispersing agent. The preparation method is: add 1g white carbon black, 1.56g glycine methyl ester hydrochloride, 0.94g histidine methyl ester hydrochloride, 0.25g alkylphenol polyoxyethylene ether to deionized water, and dilute to volume with deionized water to 500mL, stir well.

[0046] 3. Soak the plain paper prepared in s...

Embodiment 2

[0051] Embodiment 2: the preparation (two) of o-phthalaldehyde disinfectant concentration detection test paper

[0052] Prepare the test paper for detecting the concentration of o-phthalaldehyde disinfectant according to the following steps.

[0053] 1. Preparation of plain paper: first prepare 5% fixative solution. Preparation method: Weigh 50g of hydroxyethyl cellulose, dissolve it in deionized water, and dilute to 1000mL. Cut the filter paper into a size of 10cm×10cm, soak it in the solution, fully soak it, and dry it at 90°C.

[0054] 2. Preparation of A solution: A solution contains 2% adsorbent, 5% color indicator, and 1% suspending and dispersing agent. The preparation method is: add 10g white carbon black, 12.5g lysine methyl ester hydrochloride, 12.5g threonine ethyl ester hydrochloride, 5g sodium dodecylbenzenesulfonate to deionized water, and use deionized water Dilute to 500mL and stir evenly.

[0055] 3. Soak the plain paper prepared in step 1 into the solutio...

Embodiment 3

[0060] Embodiment 3: the preparation (three) of o-phthalaldehyde disinfectant concentration detection test paper

[0061] Prepare the test paper for detecting the concentration of o-phthalaldehyde disinfectant according to the following steps.

[0062] 1. Preparation of plain paper: first prepare 0.5% fixative solution. Preparation method: Weigh 5g of carboxymethyl cellulose, dissolve it in deionized water, and dilute to 1000mL. Cut the filter paper into a size of 10cm×10cm, soak it in the solution, fully soak it, and dry it at 50°C.

[0063] 2. Preparation of solution A: Solution A contains 0.2% adsorbent, 0.5% color indicator, and 0.05% suspending and dispersing agent. The preparation method is: add 1g to deionized water E200, 1.56g tryptophan methyl ester hydrochloride, 0.94g tryptophan ethyl ester hydrochloride, 0.25g sodium isooctylbenzenesulfonate, dilute to 500mL with deionized water, stir well.

[0064] 3. Soak the plain paper prepared in step 1 into the solution ...

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Abstract

The invention belongs to the technical field of disinfectant detection, and relates to test paper for detecting phthalic dicarboxaldehyde and preparation and detection methods of the test paper. According to the test paper, a color indicator is fixed on plain paper; the color indicator is selected from one or combinations of multiple of an amino-acid ester compound, arylamine and / or alkyl primary amine. According to the test paper for detecting the phthalic dicarboxaldehyde and the preparation and detection methods of the test paper, when the prepared test paper detects the concentration of the phthalic dicarboxaldehyde in disinfectant, dissolving of the color indicator fixed on the test paper in the disinfectant is reduced, so that the test paper and disinfectant contact time and the developing time have little influence on a phthalic dicarboxaldehyde concentration detection result, and the detection result is more real and reliable.

Description

technical field [0001] The invention belongs to the technical field of disinfectant detection, and relates to a test paper for detecting o-phthalaldehyde and a preparation and detection method thereof. Background technique [0002] O-phthalaldehyde (O-phthalaldehyde, OPA) is a commonly used disinfectant, which has the advantages of stable properties, wide bactericidal spectrum, strong bactericidal power, no irritation to skin and mucous membranes, and low corrosion to metals. The field of low temperature disinfection has been widely used. In order to ensure the disinfection effect, it is stipulated that the effective concentration of o-phthalaldehyde in the disinfectant solution can only be used when it is greater than 0.3% (m / v). [0003] In order to enable O-phthalaldehyde disinfectant products to be quickly tested in market supervision and daily use, in recent years, both at home and abroad are developing test strips for the concentration of O-phthalaldehyde disinfectant...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 戴彦榛史瑞雪马柏凤王玉路王舒萌王聪敏
Owner CHANGJIANGMAI MEDICINE SCI & TECH BEIJING
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