Method for rapidly determining content of mercaptoacetic acid
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 中检科健(天津)检验检测有限责任公司
- Publication Date
- 2020-04-14
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention belongs to the field of cosmetics, in particular to a rapid determination method for thioglycolic acid content. Background technique
[0002] Thioglycolic acid is the main raw material of daily cosmetic cold perm essence and depilatory agent. The content determination method under 3.9 Thioglycolic acid in Cosmetics Technical Specifications (2015 Edition) is high performance liquid chromatography, ion chromatography and titration. Thioglycolic acid has strong acidity, and requires a very low pH value to achieve better chromatographic behavior under reversed-phase chromatography conditions. Too low pH can reduce column life and increase detection cost. Ion chromatography requires the support of less widespread ion chromatographs. The third analysis method is titration with iodine titration solution in acidic environment. In comparison, the third method is economical and simple, and is very suitable for the determination of the content o...