Determination of polar pesticide residues in vegetable and fruit by supercritical fluid chromatography­Q­Orbitrap
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Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China

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R155

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    Abstract:

    Objective To establish a method for determination of 12 polar pesticide residues in vegetables and fruits by supercritical fluid chromatography-Q-Orbitrap (SFC-Q-Orbitrap).Methods The samples were extracted with 1% acidified methanol,and the extract was purified by dispersed solid phase extraction, separated by ultra silica column (150 mm× 2.1 mm, 3 μm) and obelisc r column (150 mm× 2.1 mm, 5 μm), determined by SFC-Q-Orbitrap, scanned by segmented mixed product ions, and quantified by isotope internal standard calibration curve.Results The calibration curves for 12 pesticides exhibited good linearity in the range of 20.0-500 μg/L, with the correlation coefficients(R2) above 0.997. The average recoveries at 0.05 and 0.20 mg/kg spiked levels were in the range of 80.2%-120% and the relative standard deviations (RSD,n=6) were in the range of 2.14%-14.6%. The limits of detection and the limits of quantification were 0.010 1-0.016 2 mg/kg and 0.050 mg/kg.Conclusion The method has the advantages of simple operation, accurate quantification and high efficiency. It can meet the requirements determination of high polar pesticide residues in vegetables and fruits.

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XU Qian, LU Dasheng, QIU Xinlei, FENG Chao, LIN Yuanjie, LE Sunyang, CHEN Yuhang, JIN Yu'e. Determination of polar pesticide residues in vegetable and fruit by supercritical fluid chromatography­Q­Orbitrap[J].中国食品卫生杂志,2022,34(2):254-261.

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History
  • Received:September 30,2021
  • Revised:
  • Adopted:
  • Online: May 18,2022
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