PMID- 23312555
OWN - NLM
STAT- MEDLINE
DCOM- 20130311
LR  - 20130118
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1275
DP  - 2013 Feb 1
TI  - A sol-gel polydimethylsiloxane/polythiophene coated stir bar sorptive extraction 
      combined with gas chromatography-flame photometric detection for the 
      determination of organophosphorus pesticides in environmental water samples.
PG  - 25-31
LID - S0021-9673(12)01894-8 [pii]
LID - 10.1016/j.chroma.2012.12.036 [doi]
AB  - In this work, a new method of polydimethylsiloxane/polythiophene (PDMS/PTH) 
      coated stir bar sorptive extraction (SBSE) coupled to liquid desorption-large 
      volume injection-gas chromatography-flame photometric detection (LD-LVI-GC-FPD) 
      was proposed for the determination of organophosphorus pesticides (OPPs, 
      including phorate, fenitrothion, malathion, parathion and quinalphos) in 
      environmental water samples. Polythiophene was synthesized by chemical oxidative 
      polymerization method, and the PDMS/PTH coated stir bar was prepared by sol-gel 
      technique. The preparation reproducibility of PDMS/PTH coated stir bar was good 
      with the relative standard deviations (RSDs) ranging from 3.9% to 8.1% (n=7) in 
      one batch, and from 5.9% to 14.9% (n=6) among different batches. To get the best 
      extraction performance for OPPs, the operation parameters affecting the 
      extraction efficiency of SBSE, including extraction time, desorption time, 
      stirring rate and ionic strength, were investigated. Under the optimal 
      conditions, the limits of detection (S/N=3) were found to be in the range of 
      0.011-0.038 mug/L for the five target OPPs, and the linear range was from 0.2 to 
      100 mug/L for phorate and 0.1-100 mug/L for other four OPPs. The RSDs of the 
      proposed method were in the range of 4.0-9.8% (n=8, c=1 mug/L) and the enrichment 
      factors were varied from 56.7 to 80.9-fold (theory enrichment factor was 
      100-fold). The proposed method was applied to the analysis of OPPs in East Lake 
      water and ground water samples with recovery in the range of 77.7-119.8% and 
      79.1-109.8% for the spiked East Lake water and ground water samples, 
      respectively.
CI  - Copyright (c) 2013 Elsevier B.V. All rights reserved.
FAU - Hu, Cong
AU  - Hu C
AD  - Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of 
      Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
FAU - He, Man
AU  - He M
FAU - Chen, Beibei
AU  - Chen B
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121222
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Dimethylpolysiloxanes)
RN  - 0 (Organophosphorus Compounds)
RN  - 0 (Pesticide Residues)
RN  - 0 (Polymers)
RN  - 0 (Thiophenes)
RN  - 0 (Water Pollutants, Chemical)
RN  - 25233-34-5 (polythiophene)
RN  - 63148-62-9 (baysilon)
SB  - IM
MH  - Chemical Fractionation/instrumentation/*methods
MH  - Chromatography, Gas/methods
MH  - Dimethylpolysiloxanes/*chemistry
MH  - Lakes/chemistry
MH  - Limit of Detection
MH  - Linear Models
MH  - Organophosphorus Compounds/analysis/*isolation & purification
MH  - Osmolar Concentration
MH  - Pesticide Residues/analysis/*isolation & purification
MH  - Polymers/*chemistry
MH  - Reproducibility of Results
MH  - Thiophenes/*chemistry
MH  - Water Pollutants, Chemical/analysis/*isolation & purification
EDAT- 2013/01/15 06:00
MHDA- 2013/03/12 06:00
CRDT- 2013/01/15 06:00
PHST- 2012/12/01 00:00 [received]
PHST- 2012/12/13 00:00 [revised]
PHST- 2012/12/17 00:00 [accepted]
PHST- 2013/01/15 06:00 [entrez]
PHST- 2013/01/15 06:00 [pubmed]
PHST- 2013/03/12 06:00 [medline]
AID - S0021-9673(12)01894-8 [pii]
AID - 10.1016/j.chroma.2012.12.036 [doi]
PST - ppublish
SO  - J Chromatogr A. 2013 Feb 1;1275:25-31. doi: 10.1016/j.chroma.2012.12.036. Epub 
      2012 Dec 22.