Determination of Methanol in Cosmetics by Gas Chromatography

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%.