固相萃取-毛细管气相色谱法测定小白杏中拟除虫菊酯类农药多残留

Determination of Pyrethroid Pesticide Residues in Small White Almond by Capillary Gas Chromatography and Solid Phase Extraction

应用固相萃取技术和毛细管气相色谱法，并采取程序升温模式和不分流进样方式在μ-ECD检测器上同时测定小白杏样品中四种拟除虫菊酯类农药多残留组分。测定结果表明：四种拟除虫菊酯类农药分离效果较好，其线性范围较宽，并在此浓度范围内与峰面积呈良好的线性关系；同时方法的最小检测限低于0．6μg／L（0．214～0．594μg／L），相对标准偏差均小于10％（2.48％-8．05％），其加标回收率在76．46％-102.96％之间。因此，本研究建立的方法简便、快速、经济，具有良好的灵敏度、精密度和准确度，可以满足小白杏样品中拟除虫菊酯类农药多残留检测要求，同时对其他果品中拟除虫菊酯类农药多残留分析具有一定的参考价值。

Solid phase extraction and capillary gas chromatography were applied to the determination of four pyrethroid pesticide residues in small white almond samples. The results showed that four kinds of pyrethroid pesticides were separated from each other, and the liner range of standard curve was broad. The minimum detection limit, the relative standard deviation, and the recovery rates of the method were lower than 0.6 μg/L（0.214 μg/L-0,594 μg/L）, less than 10%（2.48%-8.05%）, and between 76.46%-102.96%, respectively, The method was simple, rapid, economical and had high sensitivity, accuracy and precision. It was suitable for the determination of pyrethroid pesticide residues in small white almond samples as well as in other fruits.