Suitable steps and conditions of sample preparation for the analysis of fatty acids in vegetable oils by gas chromatography were determined and six kinds of vegetable oil samples were prepared using this method and analyzed by GC. The better steps and conditions of sample preparation were found as follows: 2mL of mixture of benzene and petroleum ether(2 /1,V / V) as an extractant was first added into about 0. 045g of vegetable oil sample; then using 2mL of 0. 4mol / L KOH-CH3OH solution as the first methyl ...
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