A method for the determination of selenium disulfide in cosmetics by gas chromatography was established.The sample was extracted with chloroform and purified with purified water,and then injected into an ultra-high inert split liner.The separation was completed on an HP-5 gas chromatographic column(30 m×0.32 mm×0.25 μm).The detection was accomplished by electron capture detector(ECD)or flame photometric detector(FPD),and external standard method were applied for quantitative analysis.The method showed good linearity in the range of 4-200 μg/mL.The limits of detection and quantification were 0.1 and 0.3 μg/mL for ECD,which was suitable for quantification.The limits of detection using FPD were 2 μg/mL,which was suitable for qualification.The spiked recoveries at 3 levels were 93.85%-117.53%,with the relative standard deviations(RSDs)of 1.92%-3.14%.This method is applicable to the determination of selenium disulfide in general shampoo cosmetics.
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