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Determination of Undecylenic Acid and Zinc Undecylenate in Cosmetics by Methyl Esterification-GC/FID Method
Author(s): 
Pages: 113-116
Year: Issue:  1
Journal: Journal of Instrumental Analysis

Keyword:  十一烯酸甲酯化气相色谱法化妆品防腐剂;
Abstract: 采用硫酸催化甲酯化法检测了化妆品中的十一烯酸及其锌盐,并对甲酯化试剂、硫酸浓度、反应体系含水量、甲酯化温度、反应时间等条件进行了优化,发现反应体系的含水量对产率影响较明显.以5%硫酸甲醇溶液为甲酯化试剂,65℃水浴中反应1h,正己烷为提取溶剂,采用GC/FID色谱法测定,外标法定量.十一烯酸甲酯产率达95%以上,该方法在0.05~ 1.0 mg范围内线性良好(r>0.999),检出限和定量下限分别...
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