FOOD SCIENCE ›› 2016, Vol. 37 ›› Issue (24): 209-215.doi: 10.7506/spkx1002-6630-201624033

• Safety Detection • Previous Articles     Next Articles

Determination of Transfer Rates of Di-(2-ethylhexyl) phthalate during Tea Brewing by Gas Chromatography-Tandem Mass Spectrometry with Isotope Simulation Technique

LIU Pingxiang, CHEN Hongping, GAO Guanwei, ZHANG Minglu, WANG Guoqing, LIU Xin   

  1. 1. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China; 2. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3. Tea Quality and Safety and Risk Assessment (Hangzhou), Ministry of Agriculture, Hangzhou 310008, China
  • Online:2016-12-25 Published:2016-12-21

Abstract: The secondary contaminant of di-(2-ethylhexyl) phthalate (DEHP) during tea infusion and sample preparation was investigated and controlled in this study. The aim of this research was to evaluate the transfer rate of DEHP during tea infusion using isotope DEHP-D4 simulation and gas chromatography-tandem mass spectrometry (GC-MS/MS). Serious secondary contaminant of DEHP could occur in the reagents and vessels used and the process of rotary evaporation, amounting to 13%–400%. Transfer rate of DEHP-D4 was found in the range of 4.5%–11.9%, which was related with tea category, brewing method and number of brewing cycles, but not with the concentration of DEHP-D4 spiked in tea. This finding is helpful for the risk assessment of DEHP and the formulation of maximum residue limit of DEHP in tea.

Key words: tea, di-(2-ethylhexyl) phthalate, isotope simulation, transfer rate, gas chromatography-tandem mass spectrometry

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