Determination of 29 organophosphorus pesticide residues in health food from Chinese herbal medicines by dispersive solid phase extraction and dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry
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(1.Key Laboratory of Trace Element Nutrition,National Institute for Nutrition and Health China CDC, Beijing 100050,China;2.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences,Beijing 100012,China;3.Environmental Standards Institute,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

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    Abstract:

    Objective To establish a method for the determination of pesticide residues in health food made from Chinese herbal medicines by dispersive solid phase extraction and dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry. Methods The samples were ultrasonic extracted by acetonitrile containing 0.5% formic acid. The supernatant was purified by dispersive solid phase extraction (d-SPE) extraction tube with anhydrous magnesium sulfate, N-propyl ethylenediamine (PSA) and C18, and then the target compounds were extracted and concentrated by the method of dispersive liquid-liquid microextraction (DLLME). Results Under optimal conditions, the linear range was 0.05-1.00 μg/ml, the linear correlation coefficient was above 0.999, the limit of detection was 0.3-3.0 μg/kg, the average recoveries of 29 kinds of pesticides were between 70.3% and 107.5%, and the relative standard deviation was less than 10%. Conclusion The method was simple, rapid, accurate and sensitive, and it could be used for the detection of organophosphorus pesticide residues in health food made from Chinese herbal medicines.

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MA Yan, CHEN Di, CHEN Xi, LIU Ting-ting, LI Qin. Determination of 29 organophosphorus pesticide residues in health food from Chinese herbal medicines by dispersive solid phase extraction and dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry[J].中国食品卫生杂志,2017,29(5):556-560.

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  • Received:June 23,2017
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  • Online: October 27,2017
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