PMID- 25038708
OWN - NLM
STAT- MEDLINE
DCOM- 20151116
LR  - 20191210
IS  - 1873-7072 (Electronic)
IS  - 0308-8146 (Linking)
VI  - 165
DP  - 2014 Dec 15
TI  - Simultaneous multi-determination and transfer of eight pesticide residues from 
      green tea leaves to infusion using gas chromatography.
PG  - 532-9
LID - S0308-8146(14)00862-0 [pii]
LID - 10.1016/j.foodchem.2014.05.145 [doi]
AB  - A method for determining eight pesticide (cyhalothrin, flufenoxuron, 
      fenitrothion, EPN, bifenthrin, difenoconazole, triflumizole, and azoxystrobin) 
      residues in made green tea as well as a tea infusion (under various brewing water 
      temperatures; 60, 80, and 100 degrees C) using gas chromatography (GC) micro-electron 
      capture detector (muECD) was developed and validated. The extraction method 
      adopted the relatively commonly used approach of solid sample hydration, with the 
      green tea hydrated before being extracted through salting out with acetonitrile 
      followed by a cleanup procedure. The analytes were confirmed using GC-coupled to 
      tandem mass spectrometry (GC/MS/MS) with a triple quadrupole. The linearity of 
      the calibration curves yielded determination coefficients (R(2)) >0.995. 
      Recoveries were carried out using blank samples spiked with all analytes at two 
      levels. The results demonstrated that all pesticides were recovered within the 
      range of 77-116% with a relative standard deviation (RSD) ⩽14%. The 
      quantification limits of 0.015-0.03 mg/kg were lower than the maximum residue 
      limits (MRLs) set by the Korea Food and Drug Administration (KFDA) for all 
      analytes (0.05-10mg/kg). The infusion study indicated that cyhalothrin, 
      flufenoxuron, and bifenthrin did not infuse into the tea brew from the made tea. 
      Increases in brewing time resulted in increased transfer of azoxystrobin, 
      fenitrothion, and difenoconazole from the made tea to the brew; however, this was 
      not the case with triflumizole or EPN. We conclude that transfer of pesticides 
      appeared to be dependent on their water solubilities and drinking a cup of tea is 
      recommended to be at a water temperature of 60 degrees C.
CI  - Copyright (c) 2014 Elsevier Ltd. All rights reserved.
FAU - Cho, Soon-Kil
AU  - Cho SK
AD  - National Agricultural Products Quality Management Service, Products Safety 
      Inspection Laboratory, Gwangsan-Gu, Gwangju, Republic of Korea.
FAU - Abd El-Aty, A M
AU  - Abd El-Aty AM
AD  - Biotechnology Research Institute, College of Agriculture and Life Sciences, 
      Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic 
      of Korea; Department of Pharmacology, Faculty of Veterinary Medicine, Cairo 
      University, 12211 Giza, Egypt. Electronic address: abdelaty44@hotmail.com.
FAU - Rahman, Md Musfiqur
AU  - Rahman MM
AD  - Biotechnology Research Institute, College of Agriculture and Life Sciences, 
      Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic 
      of Korea.
FAU - Choi, Jeong-Heui
AU  - Choi JH
AD  - Biotechnology Research Institute, College of Agriculture and Life Sciences, 
      Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic 
      of Korea.
FAU - Shim, Jae-Han
AU  - Shim JH
AD  - Biotechnology Research Institute, College of Agriculture and Life Sciences, 
      Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic 
      of Korea. Electronic address: jhshim@chonnam.ac.kr.
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140604
PL  - England
TA  - Food Chem
JT  - Food chemistry
JID - 7702639
RN  - 0 (Pesticide Residues)
RN  - 0 (Tea)
SB  - IM
MH  - Camellia sinensis/*chemistry
MH  - Chromatography, Gas/*methods
MH  - Food Contamination/*analysis
MH  - Pesticide Residues/*analysis
MH  - Plant Leaves/*chemistry
MH  - Republic of Korea
MH  - Tea/*chemistry
OTO - NOTNLM
OT  - Dried leaves
OT  - Green tea
OT  - Infusion
OT  - Leaching
OT  - Pesticides
EDAT- 2014/07/21 06:00
MHDA- 2015/11/17 06:00
CRDT- 2014/07/21 06:00
PHST- 2013/11/15 00:00 [received]
PHST- 2014/04/28 00:00 [revised]
PHST- 2014/05/27 00:00 [accepted]
PHST- 2014/07/21 06:00 [entrez]
PHST- 2014/07/21 06:00 [pubmed]
PHST- 2015/11/17 06:00 [medline]
AID - S0308-8146(14)00862-0 [pii]
AID - 10.1016/j.foodchem.2014.05.145 [doi]
PST - ppublish
SO  - Food Chem. 2014 Dec 15;165:532-9. doi: 10.1016/j.foodchem.2014.05.145. Epub 2014 
      Jun 4.