PMID- 23451519
OWN - NLM
STAT- MEDLINE
DCOM- 20140402
LR  - 20190923
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 30
IP  - 11
DP  - 2012 Nov
TI  - [Determination of multi-pesticides in black tea by subcritical water extraction 
      and gas chromatography-tandem mass spectrometry].
PG  - 1159-65
AB  - A gas chromatography-tandem mass spectrometry (GC-MS/MS) method with subcritical 
      water extraction was developed for the determination of 21 organochlorine and 
      pyrethroid pesticides in black tea. Under the extraction pressure of 5 MPa, the 
      target compounds were extracted with subcritical water at the temperature of 150 
      degrees C for 15 min, transferred into acetone-n-hexane (1:1, v/v), and 
      cleaned-up by an ENVI-Carb solid phase extraction (SPE) column. The GC separation 
      was performed on a DB-5 capillary column. The pesticides were determined by MS/MS 
      in multiple reaction monitoring (MRM) mode and quantified by matrix-matched 
      internal standard method. The calibration curves showed good linearities in the 
      range of 5.0-320.0 microg/L with the correlation coefficients greater than 0.99. 
      The limit of quantification (S/N > 10) was 50 ng/g, and the limit of detection 
      (S/N > 3) was 10 ng/g. The recoveries of pesticides spiked in the tea at three 
      levels of 50, 100 and 200 ng/g were ranged from 70. 18% to 119.98% with the 
      relative standard deviations (RSDs) of 5.01%-11.76%. The sensitivity, accuracy 
      and precision of the method meet the technical standard of the pesticide 
      determination. The method can be applied to the determination of organochlorine 
      and pyrethroid pesticides in black tea.
FAU - Pan, Yuchen
AU  - Pan Y
AD  - Shanghai Ocean University, Shanghai 201306, China.
FAU - Yi, Xionghai
AU  - Yi X
FAU - Deng, Xiaojun
AU  - Deng X
FAU - Zhao, Shanzhen
AU  - Zhao S
FAU - Chen, Shunsheng
AU  - Chen S
FAU - Yang, Huiqin
AU  - Yang H
FAU - Han, Li
AU  - Han L
FAU - Zhu, Jian
AU  - Zhu J
LA  - chi
PT  - English Abstract
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Pesticide Residues)
RN  - 0 (Tea)
SB  - IM
MH  - Food Contamination/analysis
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Liquid-Liquid Extraction/methods
MH  - Pesticide Residues/*analysis
MH  - Tandem Mass Spectrometry/*methods
MH  - Tea/*chemistry
EDAT- 2013/03/05 06:00
MHDA- 2014/04/03 06:00
CRDT- 2013/03/05 06:00
PHST- 2013/03/05 06:00 [entrez]
PHST- 2013/03/05 06:00 [pubmed]
PHST- 2014/04/03 06:00 [medline]
AID - 10.3724/sp.j.1123.2012.06033 [doi]
PST - ppublish
SO  - Se Pu. 2012 Nov;30(11):1159-65. doi: 10.3724/sp.j.1123.2012.06033.