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Rapid qualitative analysis method of formaldehyde in glutaraldehyde

A qualitative analysis, glutaraldehyde technology, applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problems of expensive instruments, complicated sample processing, difficult to popularize and apply, etc. , to achieve the effect of fast color development

Inactive Publication Date: 2016-03-09
湖北微控生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional glutaraldehyde analysis methods include: chemical titration, gas chromatography, high-pressure liquid chromatography, etc., among which chemical titration cannot distinguish formaldehyde and glutaraldehyde; gas chromatography and high-pressure liquid chromatography are expensive, and the sample Complex processing, difficult to popularize and apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Firstly, prepare Schiff reagent according to the following method: 1000ml distilled water, 0.5ml concentrated hydrochloric acid or 0.25ml concentrated sulfuric acid, 0.01g basic fuchsin, 0.5g sodium sulfite and 0.5g sodium sulfite are added to the beaker in turn, stirred evenly with a glass rod, transferred to the reagent bottle, Use within 180 days after 3 days.

[0012] Secondly, dilute concentrated hydrochloric acid or concentrated sulfuric acid into 18-20% hydrochloric acid or 24-26% sulfuric acid.

[0013] Then, take 25ml of each of the above two reagents, 1 25ml colorimetric tube, 1 5ml, 2ml pipette, 1 suction ball, 1 dropper, and perform the following analysis in any place.

[0014] Finally, use a suction bulb and a 5ml pipette to transfer 5ml Schiff reagent into a 25ml colorimetric tube, use a dropper to add 3 drops of glutaraldehyde sample to the colorimetric tube, and the solution will turn pink after 30-40 seconds after shaking; Use a suction bulb and a 2ml pipette...

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Abstract

The invention discloses a rapid qualitative analysis method of formaldehyde in glutaraldehyde. The rapid qualitative analysis method solves the problem that the prior art utilizes expensive apparatuses and has a complex process. The rapid qualitative analysis method comprises that a Schiff reagent and a strong acid solution with a certain concentration are prepared, a sample and the Schiff reagent undergo a reaction, a strong acid solution is added into the reaction product and formaldehyde in the sample can be detected according to solution color change. Through the method, it is determined if glutaraldehyde contains 0.1% or more by mass of formaldehyde in 3min.

Description

Technical field [0001] The invention relates to a rapid qualitative analysis method of formaldehyde in glutaraldehyde. Background technique [0002] Glutaraldehyde is a kind of bactericide and disinfectant with low toxicity and easy degradation. It is widely used in industrial water treatment, medical disinfection, breeding disinfection and other fields. Formaldehyde is a strong carcinogen with low price. Driven by profits, some businesses add 5-20% formaldehyde to glutaraldehyde to reduce costs, which poses great environmental and health risks. Traditional glutaraldehyde analysis methods include: chemical titration, gas chromatography, high pressure liquid chromatography, etc. Among them, chemical titration cannot distinguish between formaldehyde and glutaraldehyde; gas chromatography and high pressure liquid chromatography are expensive in instruments, and the sample is early The processing is complicated and difficult to promote and apply. The industry has been trying to fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 赵立群倪杰汤楚莹
Owner 湖北微控生物科技有限公司