PMID- 22476052
OWN - NLM
STAT- MEDLINE
DCOM- 20120719
LR  - 20120424
IS  - 1873-376X (Electronic)
IS  - 1570-0232 (Linking)
VI  - 895-896
DP  - 2012 May 1
TI  - Simultaneous determination of 45 pesticides in fruit and vegetable using an 
      improved QuEChERS method and on-line gel permeation chromatography-gas 
      chromatography/mass spectrometer.
PG  - 17-24
LID - 10.1016/j.jchromb.2012.03.006 [doi]
AB  - In this study, a method was developed to determine 45 selected pesticides (of 
      different chemical families) in fruit and vegetable (including apple, spinach and 
      cucumber). Samples were extracted using an improved QuEChERS method with salting 
      out and phase separation in two steps. The target pesticides in concentrated 
      extracts were analyzed by an on-line gel permeation chromatography-gas 
      chromatography/mass spectrometer (online-GPC-GC/MS). Online GPC effectively 
      removed matrix interferences and greatly improved the method sensitivity, 
      recoveries and automation. Method limits of quantification were 10 ng/g for 
      uniconazole and metalaxyl, and 5 ng/g for other 43 target analytes. In three 
      fruit and vegetable matrices each spiked with 45 pesticides (0.01 mug/g), mean 
      recoveries ranged from 80 to 118% for most of the tested pesticides except for 
      profenofos (77% in apple) and chlorpyrifos (68% in apple and 75% in cucumber), 
      with relative standard deviations (RSDs) of less than 14%. The results of the 
      proficiency testing showed that the method is very successful in measuring the 
      certified pesticides with less than 1.3 of the absolute value of Z-score. This 
      method has been applied for routinely monitoring pesticides in fresh fruit and 
      vegetable.
CI  - Copyright (c) 2012 Elsevier B.V. All rights reserved.
FAU - Lu, Dasheng
AU  - Lu D
AD  - Shanghai Municipal Center for Disease Control and Prevention, 1380 Zhongshan West 
      Road, Shanghai 200336, China.
FAU - Qiu, Xinlei
AU  - Qiu X
FAU - Feng, Chao
AU  - Feng C
FAU - Jin, Yu'e
AU  - Jin Y
FAU - Lin, Yuanjie
AU  - Lin Y
FAU - Xiong, Libei
AU  - Xiong L
FAU - Wen, Yimin
AU  - Wen Y
FAU - Wang, Dongli
AU  - Wang D
FAU - Wang, Guoquan
AU  - Wang G
LA  - eng
PT  - Journal Article
DEP - 20120317
PL  - Netherlands
TA  - J Chromatogr B Analyt Technol Biomed Life Sci
JT  - Journal of chromatography. B, Analytical technologies in the biomedical and life 
      sciences
JID - 101139554
RN  - 0 (Acetates)
RN  - 0 (Pesticide Residues)
SB  - IM
MH  - Acetates
MH  - Chemical Fractionation
MH  - Chromatography, Gel/*methods
MH  - Fruit/*chemistry
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Pesticide Residues/*analysis
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Vegetables/*chemistry
EDAT- 2012/04/06 06:00
MHDA- 2012/07/20 06:00
CRDT- 2012/04/06 06:00
PHST- 2011/12/30 00:00 [received]
PHST- 2012/03/02 00:00 [revised]
PHST- 2012/03/03 00:00 [accepted]
PHST- 2012/04/06 06:00 [entrez]
PHST- 2012/04/06 06:00 [pubmed]
PHST- 2012/07/20 06:00 [medline]
AID - S1570-0232(12)00155-9 [pii]
AID - 10.1016/j.jchromb.2012.03.006 [doi]
PST - ppublish
SO  - J Chromatogr B Analyt Technol Biomed Life Sci. 2012 May 1;895-896:17-24. doi: 
      10.1016/j.jchromb.2012.03.006. Epub 2012 Mar 17.