气相色谱法同时测定防晒类化妆品中13种紫外吸收剂

Simultaneous Determination of 13 UV Absorbers in Sunscreen Cosmetics by GC

摘要: 采用气相色谱法同时测定防晒类化妆品中13种紫外吸收剂的含量。化妆品样品用甲醇超声提取，用Agilent DB-5色谱柱（30 m×0.25 mm，0.25 μm）分离，氢火焰离子化检测器检测。13种紫外吸收剂的质量浓度均在10.0~500.0 mg·L^-1内与其对应的峰面积呈线性关系，方法的检出限（3S/N）为2.0~5.0 mg·L^-1。以空白样品为基体进行加标回收试验，所得回收率为91.0%~106%，测定值的相对标准偏差（n=6）为0.040%~6.3%。

Abstract: GC was applied to the simultaneous determination of 13 UV absorbers in sunscreen cosmetics. The cosmetic sample was extracted ultrasonically with methanol. The analytes were separated on Agilent DB-5 chromatographic column (30 m×0.25 mm, 0.25 μm) and detected by FID. Linear relationships between values of peak area and mass concentration of the 13 UV absorbers were kept in the same range of 10.0-500.0 mg·L^-1, with detection limits (3S/N) in the range of 2.0-5.0 mg·L^-1. On the base of blank sample, test for recovery was made by standard addition method; values of recovery found were in the range of 91.0%-106%, with RSDs (n=6) in the range of 0.040%-6.3%.