Journal
FOOD CHEMISTRY
Volume 197, Issue -, Pages 1200-1206Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.11.082
Keywords
Tea; Tea infusion; Phthalate esters; Simultaneous distillation extraction; Gas chromatography-mass spectrometry
Funding
- program the Cheung Kong Scholars and Innovative Research Team Program in University [IRT1166]
- 863 (Hi-tech research and development program of China) program [SS2012AA023408]
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Phthalate esters (PAEs), a group of environmental pollutants which are carcinogenic to human body, have been detected in teas. In this work, five PAEs in teas and tea infusions were quantitatively determined by a modified simultaneous distillation extraction (SDE) coupled with gas chromatography-mass spectrometry. After the optimization of SDE, the proposed method afforded a wide range of linearity and high linear regression coefficients with the limits of detection range of 0.24-3.72 mu g/kg. The average recoveries were 79.83-116.67% for tea samples and 78.22-101.64% for tea infusions with all the relative standard deviations below 20%. The total content of five PAEs in teas was 1.135-3.734 mg/kg and the total dissolving ratio of five PAEs from tea to infusion was 19.05-28.07% for the selected tea samples. The risk assessment result of all the selected tea samples demonstrated that the population with the habit of drinking tea won't cause risk to human health. (C) 2015 Elsevier Ltd. All rights reserved.
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