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Determination of Heavy Metals,Pesticide Residues,and Aflatoxin in Chaenomeles speciosa Nakai

LIU Yi;XU Hui-qun;XIE Xiao-mei;YANG Mo;SHEN Pan-pan;HAN Yu;KUANG Zuo-pin;School of Pharmacy,Anhui University of Chinese Medicine;Anhui Entry-Exit Inspection and Quarantine Bureau;  
Objective To investigate the safety of Chaenomeles speciosa Nakai for food and medication and provide evidence for its quality control.Methods For 8batches of Chaenomeles speciosa Nakai samples,the content of Pb,Cd,Cu,As,and Hg was determined using graphite furnace atomic absorption spectrometry,flame atomic absorption spectrometry,and atomic fluorescence spectrometry,while the residual levels of organochlorine,pyrethroids,and organophosphorus pesticides were determined using gas chromatography.The aflatoxin content in Chaenomeles speciosa Nakai samples stored under natural condition for1-2years was determined by means of immunoaffinity column clean-up and high-performance liquid chromatography.Results In 8batches of Chaenomeles speciosa Nakai samples,the content of Pb,Cd,Cu,As,and Hg was all below the prescribed limits,while the residual levels of organochlorine,organophosphorus pesticides,and pyrethroids were all below the detection limits.In 6batches of Chaenomeles speciosa Nakai samples in storage,the total content of aflatoxin B1,B2,G1,and G2 was all below the detection limits.Conclusion Chaenomeles speciosa Nakai from major production areas are qualified in tests of heavy metals,pesticide residues,and aflatoxin,and they are safe for food and medication.
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