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| Residue Analysis of Four Acaricides in Apple and Citrus by GC/ECD after QuEChERS Clean-up |
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| DOI： |
| KeyWord:QuEChERS GC/ECD apple citrus acaricide residue analysis |
| Author | Institution |
| XU Guo-feng,NIE Ji-yun*,LI Hai-fei,YAN Zhen,LI Jing |
中国农业科学院果树研究所，农业部果品质量安全风险评估实验室（兴城） |
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| Abstract: |
| A GC/ECD method was developed and validated for the simultaneous analysis of clofentezine,bromopropylate,chlorfenapyr,and pyridaben residues in apple and citrus.The apple and citrus samples were extracted with acetonitrile,and purified by QuEChERS method using C18 and MgSO4 as adsorbents,then determined by GC/ECD and quantified by the matrix-matched standards solution.The result showed that the calibration curves were linear in the ranges of 0.02-2.0 mg/L for clofentezine and pyridaben,and 0.004-0.5 mg/L for bromopropylate and chlorfenapyr,with correlation coefficients more than 0.99.The limits of quantitation（LOQs） for four acaricides were between 0.001 mg/kg and 0.02 mg/kg.The average recoveries（n=6） of the four analytes in apple and citrus at three spiked levels were between 76.4% and 111.8% with RSDs not more than 13.4%.This method is simple,rapid,effective and safe,and could meet the requirements for the simultaneous-determination of clofentezine,bromopropylate,chlorfenapyr and pyridaben residues in apple and citrus samples． |
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