Determination of free and total phthalates in commercial whole milk products in different packaging materials by gas chromatography-mass spectrometry
作者： Jialu Lin , Wanxin Chen , Hangcui Zhu , Chengjun Wang
关键词:
摘要: We developed a method for extraction and determination of free total phthalate esters in commercial whole milk products. The phthalates samples were extracted with ethyl acetate after general pretreatment procedures including protein precipitation, centrifugation, filtration. bound first desorbed the aid ultrasound irradiation before phthalates. separation extracts was performed by gas chromatography coupled mass spectrometric detection. detection limits range 0.09 to 0.36ng/g average recovery between 79.1 110.3%. methods applied extract determine products different packaging materials, plastic, glass, metal. All contained several phthalates, diethyl, diisobutyl, bis(2-ethylhexyl) at concentrations 2.60 156.4ng/g. identified occurred both forms. amounts packaged glass metal containers much lower than those plastic containers. Plastic materials are possible source contamination products, considerable portion bleached from can be adsorbed on proteins other solid components milk.
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