期刊
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
卷 25, 期 11, 页码 1416-1423出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02652030802163380
关键词
gas chromatography-ion-trap tandem mass spectrometry (GC-IT-MS; MS); 2; 6-diisopropylnaphthalene (DIPN); n-dibutylphthalate (DBP); paper food package; dry foods
A gas chromatography-ion-trap tandem mass spectrometry procedure was developed for the determination of 2,6-diisopropylnaphthalene (DIPN) and n-dibutylphthalate (DBP) in domestic and imported paper packages and food sold in US marketplaces. The procedure involved ultrasonic extraction with dichloromethane, followed by analysis with the gas chromatography-ion-trap tandem mass spectrometry. Calibration curves for DIPN and DBP were achieved with concentrations ranging from 0.01 to 10 g ml-1 and the corresponding r2 values were 0.9976 and 0.9956, respectively. In most of the fortified samples the recoveries were higher than 80% with a relative standard deviation (RSD) 10%. Using this procedure, it was found that less than 20% of the tested domestic packages and more than 60% of the tested imported food packages contained both DIPN and DBP. The concentrations of DIPN and DBP ranged from 0.09 to 20 mg kg-1 and 0.14 to 55 mg kg-1, respectively, with most of the DINP and DBP levels lower than 20 mg kg-1. DIPN was not detected (0.01 mg kg-1) in 41 food samples and DBP was only detected in two domestic and four imported food samples with concentrations ranging from 0.01 to 0.81 mg kg-1.
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