气相色谱法测定化妆品用原料聚乙烯醇中甲醇含量

doi:10.13218/j.cnki.csdc.2018.06.010

Abstract

Abstract: A gas chromatography method was established for the determination of methanol in polyvinyl alcohol used in cosmetics.It is found that headspace method is more suitable than distillation method and direct dilution method to determine the methanol in polyvinyl alcohol used in cosmetics.The factors of solvent and salting-out agent were investigated and the appropriate conditions are 10 mL water and 0.5 g sodium chloride,respectively.Results indicate that the linear relationship of methanol in the range of 10-1 000 mg/L is good,with correlation coefficient of 0.999 5.The recoveries are ranged from 92.6% to 104.8%,while the relative standard deviations are ranged from 1.2% to 6.5% and the detection limit is 5 mg/L.The results prove that this method is suitable for the determination of methanol in polyvinyl alcohol used in cosmetics.

Key words: cosmetic ingredients, polyvinyl alcohol, headspace gas chromatography, methanol

CLC Number:

TQ658

YANG Ming, ZHANG Li-hua, HU Dan, WANG Chen-lei, REN Cheng-fang. Determination of methanol in polyvinyl alcohol used in cosmetics by gas chromatography[J].China Surfactant Detergent & Cosmetics, 2018, 48(6): 352-355.

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Determination of methanol in polyvinyl alcohol used in cosmetics by gas chromatography

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