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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28269

    Title: Determination of alkylphenol residues in breast and commercial milk by solid-phase extraction and gas chromatography-mass spectrometry
    Authors: Lin,WC;Wang,SL;Cheng,CY;Ding,WH
    Contributors: 中央大學
    Date: 2009
    Issue Date: 2010-06-29 19:45:12 (UTC+8)
    Publisher: 化學研究所
    Abstract: This Study presents a feasible and sensitive method to determine alkylphenol residues (i.e., 4-t-octylphenol (4-t-OP) and the isomers of 4-nonylphenols (4-NPs)) in breast milk samples and commercial cow milk products. The matrix interference associated with the constituents in the milk was reduced by extraction with n-hexane and dilution with 50% methanolic solution (v/v, methanol/water), then followed by the Oasis-HLB SPE extraction. The analytes were determined by a CC-MS system in full-scan and selected ion monitoring modes simultaneously. Limit of quantitation was less than 0.05 ng/g in a 20 g (wet weight) milk sample. The 4-NPs were detected in 19 of the 20 breast milk samples at concentrations ranging from 1.7 to 11.6 ng/g, while 4-t-OP was detected in 8 samples at concentrations ranging from 0.4 to 1.1 ng/g. The 4-NPs were detected in all the testing commercial cow milk products at concentrations ranging from 2.9 to 8.8 ng/g. (C) 2008 Elsevier Ltd. All rights reserved.
    Relation: FOOD CHEMISTRY
    Appears in Collections:[化學研究所] 期刊論文

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