title: Determination of phthalate esters in teas and tea infusions by gas chromatography-mass spectrometry.
abstract: 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 μg/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.
authors.affiliation: Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, Tianjin Industrial Microbiology Key Laboratory, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China. Electronic address: dlp123@tust.edu.cn.
authors.forename: Liping
authors.initials: L
authors.lastname: Du
authors.affiliation: Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, Tianjin Industrial Microbiology Key Laboratory, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Ma
authors.affiliation: Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, Tianjin Industrial Microbiology Key Laboratory, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, Tianjin Industrial Microbiology Key Laboratory, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, Tianjin Industrial Microbiology Key Laboratory, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China.
authors.forename: Dongguang
authors.initials: D
authors.lastname: Xiao
mesh_terms: D057168:Distillation; D004785:Environmental Pollutants / Q000032:analysis*; D004952:Esters / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D016014:Linear Models; D010795:Phthalic Acids / Q000032:analysis*; D013662:Tea / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D004952:Esters; D010795:Phthalic Acids; D013662:Tea
keywords: Gas chromatography–mass spectrometry; Phthalate esters; Simultaneous distillation extraction; Tea; Tea infusion