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GC—ECD定量检测草莓中12种菊酯类农药残留研究

2016-10-20贾晓菲李拥军黎小鹏

现代农业科技 2016年9期
关键词:检测

贾晓菲 李拥军 黎小鹏

摘要 建立了一种利用气相色谱仪—电子捕获检测器检测草莓中百菌清、三唑酮、腐霉利、硫丹、联苯菊酯、甲氰菊酯、氯氟氰菊酯、氯菊酯、氟氯氰菊酯、氯氰菊酯、氰戊菊酯和溴氰菊酯共12种菊酯类农药残留的方法。结果表明,12种菊酯类农药在15 min内均能良好分离,且在0.05~1.00 mg/L范围内线性良好,相关系数均在0.995以上,添加回收率在83.5%~107.0%之间,相对标准偏差为2.55%~10.69%,方法检出限为0.000 1~0.002 0 mg/kg。该方法简便快速、准确灵敏,适合草莓中菊酯类多农药残留的检测和安全监控。

关键词 GC-ECD;草莓;菊酯类农药;残留量;检测

中图分类号 S481.8 文献标识码 A 文章编号 1007-5739(2016)09-0133-02

Abstract An analysis method for detection on 12 kinds of pyrethroid pesticides residue,including cholrothalonil,traidimefon,procymidone,endosulfan,bifenthrin,fenpropathrin,lambda-cyhalothrin,permethrin,cyfluthrin,cypermethrin,fenvalerate,deltamethrin in strawberry by gas chrom-atograph-ECD-detection(GC-ECD)was established. The results showed that the twelve pyrethroid pesticides could be well separated within 15 min,the calibration curves were in good linearity with correlation coefficients not less than 0.995 between the concentration of 0.05~1.00 mg/L.The recovery range was 83.5%~107.0% with relative standard deviations of 2.55%~10.69%,the detection limit was 0.000 1~0.002 0 mg/kg.This method was simple,quick,accurate,sensitive,and it was suitable for the detection and security monitoring of pyrethroid pesticides residue in strawberry.

Key words GC-ECD;strawberry;pyrethroid pesticides;residue;detection

草莓,属蔷薇科植物,别名洋莓、红莓、地莓、蛇莓等。草莓不仅营养丰富,而且还具有极高的药用价值和保健功能,含有人体必需的纤维素、铁、钾、维生素C、黄酮类、酚酸类等多种生物活性物质,能够预防心脑血管疾病、贫血、增强免疫力、抗癌、美容、促消化等,有着“水果皇后”“活的维生素丸”等美誉[1],深受人们的喜爱。

草莓易栽培,产量高,经济效益好,近年来已成为我国一项重要的经济发展项目。但是,随着草莓种植面积迅速扩大,草莓病虫害防控中农药的用量日趋增多,其潜在的农药残留问题也变得尤为严重。目前农户在草莓种植过程中经常会喷洒以杀菌剂、杀虫剂为主的菊酯类农药,如百菌清、腐霉利、氯氰菊酯、氯氟氰菊酯、氰戊菊酯等。菊酯类农药在提高草莓产量的同时,也增加了草莓中农药残留的超标问题,严重影响了草莓的质量安全,危害人类的身体健康。……

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