Studies on Simultaneous Analysis of Organophosphorus Pesticide Residues in Crops by Gas-Liquid Chromatography (). Separation of Pesticides by Capillary Column

摘要

The optimum resolution condition of 11 organophosphorus pesticides by gas-liquid chromatography was studied using a capillary column. The injection modes and types of vaporization tubes were evaluated in relation to pesticide analysis. The best reproducibility of peak heighhts of pesticides was obtained by the split mode with the vaporization tube packed with quartz wool. A 25m SE-30 capillary column provided better resolution than SE-54 column for their optimum resolution. The column at 200?é initially was heated by 5?é/min to 230?é, followed by 10?é/min to 270?é, and the temperatures were held constant for 5 minutes at 230?é and 270?é, respectively. The relative standard deviations of their retention times were less than 0.19%.