气流式微注射器萃取与气相色谱-质谱联用直接分析烟叶中菊酯类农药

Directly analysis of pyrethroid pesticides in tobacco leaf using gas purge microsyringe extraction technique combined with gas chromatography-mass spectroscopy

将气流式微注射器萃取技术（GP-MSE）与气相色谱-质谱（GC-MS）联用,建立了一种快速、简单的检测烟叶中菊酯类农药的方法,并通过优化萃取条件和加标回收率实验评价了方法的准确性.结果表明,6种菊酯类农药的加标回收率在83.56%-95.87%之间,相对标准偏差在1.3%-7.6%之间,具有很好的回收率与重复性,说明本文方法可用于检测烟叶样品中的菊酯类农药.

To achieve a rapid,simple analytical method of pyrethroid pesticides in tobacco leaves,the gas purge microsyringe extraction（GP-MSE）combined with gas chromatography-mass spectroscopy（GC-MS）is applied.The accuracy of this method is evaluated by spiked recoveries and optimized extractive condition.The results showed that recoveries were 83.56%-95.87%,relative standard deviations（RSD）were 1.3%-7.6%,respectively.These results further indicate that this method possess good recovery and repeatability.Therefore,it can be used for the detection of the pyrethroid pesticides in tobacco leaves samples.