超声振荡辅助提取SPE-GC/MS法测定袋泡茶中的49种农药残留

Determination of 49 pesticide residues in tea bags by ultrasonic assisted extraction SPE-GC/MS

摘要: 本研究建立了SPE-GC/MS测定袋泡茶农药残留的方法,并对市售35份袋泡茶样品的农药残留进行了检测。样品经粉碎后依次采用丙酮进行超声和振荡萃取,用固相萃取柱净化,采用GC/MS进行测定分析。结果表明:丙酮可以对49种农药进行很好地萃取,采用GC/MS分离49种农药效果良好,农药检出限在0.001⁰.015mg/kg之间。袋泡茶中的残留农药主要是联苯菊酯、毒死蜱、甲氰菊酯和氯氟氰菊酯,检出浓度远小于GB2763-2012规定的限值。本方法简单,快速,可靠。

Abstract: A method for rapid determination of 49 pesticide residues in tea bags by GC /MS was established, and 35 of tea bags samples were detected.Pesticide residues in tea bags were extracted using acetone and clean-up by SPE after being concentrated, then it was detected by GC /MS.Results showed that pesticide residues in tea bags could be extracted using acetone as well as separated by GC /MS.The detection limits were 0.001⁰.015mg /kg by spiked experiments. Pesticide residues in tea bags mainly were bifenthrin, chlorpyrifos, fenpropathrin and cyhalothrin.According to national standard ( NO.GB2763-2012) , the pesticides level of tea bags was lower than the standard limits.This method is simple, rapid and reliable.