Gas Chromatographic Determination of Chloropropanols in Stocks

Gas chromatography with capillary column was applied to the determination of chloropropanols in stocks.Chloropropanols in the stock sample was extracted with ethyl ether using Soxhlet apparatus,and the ethyl ether was evaporated by nitrogen stream.The chloropropanols were then purified by extraction with methanol twice in 1 mL portions.The extracts were collected and methanol was evaporated,and derivatized with N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA).The derivatives was separated on the capillary chromatographic column and determined by flame ionization detection.Detection limit of the method was 0.01 mg·kg-1.Tests for recovery and precision were done giving values of recovery in the range from 95% to 102%,and RSD′s (n=5) less than 4.5%.