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- Title
Determination of 2,6-diisopropylnaphthalene (DIPN) and n-dibutylphthalate (DBP) in food and paper packaging materials from US marketplaces.
- Authors
Zhang, K; Noonan, G O; Begley, T H
- Abstract
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 microg ml(-1) and the corresponding r(2) 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).
- Publication
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 2008, Vol 25, Issue 11, p1416
- ISSN
1944-0057
- Publication type
Journal Article
- DOI
10.1080/02652030802163380