PMID- 21315911
OWN - NLM
STAT- MEDLINE
DCOM- 20110601
LR  - 20220409
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 84
IP  - 1
DP  - 2011 Mar 15
TI  - Determination of 17 pyrethroid residues in troublesome matrices by gas 
      chromatography/mass spectrometry with negative chemical ionization.
PG  - 141-7
LID - 10.1016/j.talanta.2010.12.041 [doi]
AB  - An analytical method with the technique of QuEChERS (quick, easy, cheap, 
      effective, rugged and safe) and gas chromatography (GC)/mass spectrometry (MS) in 
      negative chemical ionization (NCI) has been developed for the determination of 17 
      pyrethroid pesticide residues in troublesome matrices, including garlic, onion, 
      spring onion and chili. Pyrethroid residues were extracted with acidified 
      acetonitrile saturated by hexane. After a modified QuEChERS clean-up step, the 
      extract was analyzed by GC-NCI/MS in selected ion monitoring (SIM) mode. An 
      isotope internal standard of trans-cypermethrin-D(6) was employed for 
      quantitation. Chromatograms of pyrethroids obtained in all these matrices were 
      relatively clean and without obvious interference. The limits of detection (LODs) 
      ranged from 0.02 to 6 mug kg(-1) and recovery yields were from 54.0% to 129.8% at 
      three spiked levels (20, 40 and 60 mug kg(-1) for chili, and 10, 20 and 30 mug 
      kg(-1) for others) in four different matrices depending on the compounds 
      determined. The relative standard deviations (RSDs) were all below 14%. 
      Isomerization enhancement of pyrethroids in chili extract was observed and 
      preliminarily explained, especially for acrinathrin and deltamethrin.
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Shen, Chong-yu
AU  - Shen CY
AD  - Jiangsu Entry-Exit Inspection and Quarantine Bureau of PRC, 99 Zhonghua Road, 
      Nanjing 210001, China. shchy@jsciq.gov.cn
FAU - Cao, Xiao-wen
AU  - Cao XW
FAU - Shen, Wei-jian
AU  - Shen WJ
FAU - Jiang, Yuan
AU  - Jiang Y
FAU - Zhao, Zeng-yun
AU  - Zhao ZY
FAU - Wu, Bin
AU  - Wu B
FAU - Yu, Ke-yao
AU  - Yu KY
FAU - Liu, Han
AU  - Liu H
FAU - Lian, Hong-zhen
AU  - Lian HZ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110108
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Pesticide Residues)
RN  - 0 (Pyrethrins)
SB  - IM
MH  - Food Analysis/economics/*methods
MH  - Food Contamination/*analysis
MH  - Gas Chromatography-Mass Spectrometry/economics/*methods
MH  - Limit of Detection
MH  - Linear Models
MH  - Pesticide Residues/*analysis/chemistry
MH  - Pyrethrins/*analysis/chemistry
MH  - Reproducibility of Results
MH  - Time Factors
MH  - Vegetables/*chemistry
EDAT- 2011/02/15 06:00
MHDA- 2011/06/02 06:00
CRDT- 2011/02/15 06:00
PHST- 2010/10/02 00:00 [received]
PHST- 2010/12/18 00:00 [revised]
PHST- 2010/12/21 00:00 [accepted]
PHST- 2011/02/15 06:00 [entrez]
PHST- 2011/02/15 06:00 [pubmed]
PHST- 2011/06/02 06:00 [medline]
AID - S0039-9140(11)00008-7 [pii]
AID - 10.1016/j.talanta.2010.12.041 [doi]
PST - ppublish
SO  - Talanta. 2011 Mar 15;84(1):141-7. doi: 10.1016/j.talanta.2010.12.041. Epub 2011 
      Jan 8.