期刊
ANALYTICA CHIMICA ACTA
卷 457, 期 2, 页码 187-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0003-2670(02)00017-X
关键词
corticosteroids; cosmetic products analysis; HPLC; TLC; SPE
A solid-phase extraction clean-up and and a liquid chromatographic method with ultraviolet detection x ere developed for the analysis of 51 corticosteroids in cosmetic samples in order to screen commercial samples for the presence of undeclared synthetic corticosteroids. A thin-layer chromatographic analysis was carried out on silica gel plates, using different eluants and detection reagents. When such a preliminary chromatographic separation gave some indications about the presence of steroid compounds, the methanol extracts from real samples were applied to a solid-phase extraction C-18 cartridge, and the analytes eluted with ethyl ether. The high-performance liquid chromatographic separation was then carried out for the identification and determination of the analytes using a Purospher RP-18 column, an isocratic or a gradient elution with a mixture acetonitrile-water and a photodiode-array detector. The accuracy of the method was determined by spiking experiments on home-made cosmetic samples. The analytical recoveries were satisfactory. (C) 2002 Published by Elsevier Science B.V.
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