摘要：Analysis of methanol in cosmetics by chromotropic acid colorimetry is troublesome and time-consuming. For the pourpose of establishing much faster and simpler analytical method, application of gas chromatography was developed, the optimum conditions obtained being as follows : Column : 3 mmφ×3m, 10% DOP-PEC # 1000 (1 : 2) on Celite 545, temp. : 50°, carrier gas : He 40ml/min Methanol can be determined at the level of 0.01%, and detected at a limit of 0.005% on TCD and 0.003% on FID. By this method, methanol in cosmetics, even in the presence of a large quantity of ethanol, can be determined directry.
