Rapid screening of multi-residue pesticides in tea by UPLC-MS/MS
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(National Institute for Nutrition and Health,Chinese Center for Disease Control and Prevention,Bejing 100050,China)

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    Abstract:

    To establish a rapid screening and confirmation method for pesticide residues in tea using UPLC-MS/MS for instrument method and QuEChERS for sample preparation.Methods The pesticide residues were extracted from tea samples with acetonitrile, and purified by dispersion solid phase extraction (d-SPE) using N-propyl ethlene diamine (PSA), graphitized carbon black(GCB) and triple phase of tea(TPT). The pesticide analytes were then separated on a reversed phase column using a gradient elution program. The ion fragment were obtained using ultra high performance liquid chromatography-tandem mass spectrometry under multiple reaction monitoring mode and quantified by the external standard method. Results In checking tea sample, 10 pesticide were screened qualitatively and carried on the quantitative analysis. The method showed a good linearity (r>0.999) in the ranges of 0.1-20 μg/L for 10 pesticide with average recovery rates of 75.7%-105.8% and the relative standard deviation (RSD) of 2.3%-18.4%. The limits of quantification (LOQs) for 10 pesticide were between 0.5 and 2 μg/kg.Conclusion The method was simple, sensitive and accurate, and was suitable for confirmation multi-residue pesticides in agricultural products.

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HAN Lu, CHEN Da-wei, LV Bing, MIAO Hong. Rapid screening of multi-residue pesticides in tea by UPLC-MS/MS[J].中国食品卫生杂志,2015,27(4):386-393.

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  • Received:
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  • Online: August 31,2015
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