Simultaneous Determination of 13 UV Absorbers in Sunscreen Cosmetics by GC

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%.