title: Occurrence and Residue Pattern of Phthalate Esters in Fresh Tea Leaves and during Tea Manufacturing and Brewing.
abstract: The residues of 16 phthalate esters (PAEs) in fresh tea leaves and made tea were determined via gas chromatography-tandem mass spectrometry to study their distribution and degradation characteristics during tea planting and processing. Five PAEs were detected in all fresh tea leaves, and higher concentrations were detected in mature leaves. The distribution of PAEs in fresh tea leaves ranged from 69.7 to 2244.0 μg/kg. The degradative percentages of ∑5PAEs during green tea manufacturing ranged from 61 to 63% and were significantly influenced by the drying process. The transfer rates of PAEs-D4ranged from 5.2 to 100.6%. PAEs with a high water solubility showed the highest transfer coefficient in the range of 91.8-100.6%, whereas PAEs with a high log Kowshowed a low leaching efficiency below 11.9%. These results benefit the risk evaluation and establishment of a maximum residue limit for PAEs in tea.
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Graduate School of Chinese Academy of Agricultural Sciences , Beijing 100081, China.
authors: Pingxiang
authors: P
authors: Liu
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Hongping
authors: H
authors: Chen
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Graduate School of Chinese Academy of Agricultural Sciences , Beijing 100081, China.
authors: Guanwei
authors: G
authors: Gao
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Zhenxia
authors: Z
authors: Hao
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Chen
authors: C
authors: Wang
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Guicen
authors: G
authors: Ma
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Yunfeng
authors: Y
authors: Chai
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Graduate School of Chinese Academy of Agricultural Sciences , Beijing 100081, China.
authors: Lin
authors: L
authors: Zhang
authors: Tea Research Institute, Chinese Academy of Agricultural Sciences , Hangzhou 310008, China.|Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture , Hangzhou 310008, China.
authors: Xin
authors: X
authors: Liu
mesh_terms: D028241:Camellia sinensis / Q000737:chemistry*; D003296:Cooking; D004952:Esters / Q000737:chemistry*; D005511:Food Handling; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D010573:Pesticide Residues / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D013662:Tea / Q000737:chemistry*
chemical_list: D004952:Esters; D010573:Pesticide Residues; D010795:Phthalic Acids; D013662:Tea; C032279:phthalic acid
keywords: gas chromatography−tandem mass spectrometry; phthalate ester; residue pattern; tea; transfer rate