PMID- 22153286
OWN - NLM
STAT- MEDLINE
DCOM- 20120222
LR  - 20220409
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1219
DP  - 2012 Jan 6
TI  - Ultra-preconcentration and determination of thirteen organophosphorus pesticides 
      in water samples using solid-phase extraction followed by dispersive 
      liquid-liquid microextraction and gas chromatography with flame photometric 
      detection.
PG  - 61-5
LID - 10.1016/j.chroma.2011.11.019 [doi]
AB  - An ultra-preconcentration technique composed of solid-phase extraction (SPE) and 
      dispersive liquid-liquid microextraction (DLLME) coupled with gas 
      chromatography-flame photometric detection (GC-FPD) was used for determination of 
      thirteen organophosphorus pesticides (OPPs) including phorate, diazinon, 
      disolfotane, methyl parathion, sumithion, chlorpyrifos, malathion, fenthion, 
      profenphose, ethion, phosalone, azinphose-methyl and co-ral in aqueous samples. 
      The analytes were collected from large volumes of aqueous solutions (100 mL) into 
      100 mg of a SPE C(18) sorbent. The effective variables of SPE including type and 
      volume of elution solvent, volume and flow rate of sample solution, and salt 
      concentration were investigated and optimized. Acetone was selected as eluent in 
      SPE and disperser solvent in DLLME and chlorobenzene was used as extraction 
      solvent. Under the optimal conditions, the enrichment factors were between 15,160 
      and 21,000 and extraction recoveries were 75.8-105.0%. The linear range was 
      1-10,000 ng L(-1) and limits of detection (LODs) were between 0.2 and 1.5 ng 
      L(-1). The relative standard deviations (RSDs) for 50 ng L(-1) of OPPs in water 
      with and without an internal standard, were in the range of 1.4-7.9% (n=5) and 
      4.0-11.6%, respectively. The relative recoveries of OPPs from well and farm water 
      sat spiking levels of 25 and 250 ng L(-1) were 88-109%.
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Samadi, Soheila
AU  - Samadi S
AD  - Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran.
FAU - Sereshti, Hassan
AU  - Sereshti H
FAU - Assadi, Yaghoub
AU  - Assadi Y
LA  - eng
PT  - Journal Article
DEP - 20111119
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 0 (Organothiophosphorus Compounds)
RN  - 0 (Pesticides)
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Chromatography, Gas/*methods
MH  - Limit of Detection
MH  - Liquid Phase Microextraction/*methods
MH  - Organothiophosphorus Compounds/*analysis/isolation & purification
MH  - Pesticides/*analysis/isolation & purification
MH  - Reproducibility of Results
MH  - Solid Phase Extraction/*methods
MH  - Water/chemistry
MH  - Water Pollutants, Chemical/*analysis/isolation & purification
EDAT- 2011/12/14 06:00
MHDA- 2012/02/23 06:00
CRDT- 2011/12/14 06:00
PHST- 2011/09/13 00:00 [received]
PHST- 2011/11/10 00:00 [revised]
PHST- 2011/11/11 00:00 [accepted]
PHST- 2011/12/14 06:00 [entrez]
PHST- 2011/12/14 06:00 [pubmed]
PHST- 2012/02/23 06:00 [medline]
AID - S0021-9673(11)01701-8 [pii]
AID - 10.1016/j.chroma.2011.11.019 [doi]
PST - ppublish
SO  - J Chromatogr A. 2012 Jan 6;1219:61-5. doi: 10.1016/j.chroma.2011.11.019. Epub 
      2011 Nov 19.