应用气相色谱法测定了化妆品中甲醇。低黏度样品(如香水、花露水等)可直接进样,高黏度样品则需用稀释法或蒸馏法预处理。按文中所述3种方法处理样品,从所得溶液中分取2 μL进样进行气相色谱分析,用火焰离子化检测器进行检测。方法的线性范围在20.0~2 000.0 mg·L-1之间,检出限(3S/N)为6.0 mg·L-1。按标准加入法做回收试验,所测得回收率在94.3%~101.0%之间。

Methanol in cosmetics was determined by gas chromatography. Samples with low viscosity (e.g., perfume, toilet water etc.,) were introduced directly into the instrument for GC analysis. Samples with high viscosity were pretreated by dilution or by distillation. Two μL of the sample solution (obtained by either of the 3 ways as described in the paper) were introduced for GC analysis, with FID detection. Linearity range of the method was kept between 20.0 to 2 000.0 mg·L-1, with detection limit (3S/N) of 6.0 mg·L-1. Tests for recovery were made by standard addition method, giving values of recovery in the range of 94.3%-101.0%.