PMID- 25770621
OWN - NLM
STAT- MEDLINE
DCOM- 20151214
LR  - 20171116
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 137
DP  - 2015 May
TI  - Chemometric assisted ultrasound leaching-solid phase extraction followed by 
      dispersive-solidification liquid-liquid microextraction for determination of 
      organophosphorus pesticides in soil samples.
PG  - 167-73
LID - S0039-9140(15)00059-4 [pii]
LID - 10.1016/j.talanta.2015.01.031 [doi]
AB  - Ultrasound leaching-solid phase extraction (USL-SPE) followed by 
      dispersive-solidification liquid-liquid microextraction (DSLLME) was developed 
      for preconcentration and determination of organophosphorus pesticides (OPPs) in 
      soil samples prior gas chromatography-mass spectrometry analysis. At first, OPPs 
      were ultrasonically leached from soil samples by using methanol. After 
      centrifugation, the separated methanol was diluted to 50 mL with 
      double-distillated water and passed through the C18 SPE cartridge. OPPs were 
      eluted with 1 mL acetonitrile. Thus, 1 mL acetonitrile extract (disperser 
      solvent) and 10 microL 1-undecanol (extraction solvent) were added to 5 mL 
      double-distilled water and a DSLLME technique was applied. The variables of 
      interest in the USL-SPE-DSLLME method were optimized with the aid of chemometric 
      approaches. First, in screening experiments, fractional factorial design (FFD) 
      was used for selecting the variables which significantly affected the extraction 
      procedure. Afterwards, the significant variables were optimized using response 
      surface methodology (RSM) based on central composite design (CCD). Under the 
      optimum conditions, the enrichment factors were 6890-8830. The linear range was 
      0.025-625 ng g(-1) and limits of detection (LODs) were between 0.012 and 0.2 ng 
      g(-1). The relative standard deviations (RSDs) were in the range of 4.06-8.9% 
      (n=6). The relative recoveries of OPPs from different soil samples were 85-98%.
CI  - Copyright (c) 2015 Elsevier B.V. All rights reserved.
FAU - Ahmadi, Kamyar
AU  - Ahmadi K
AD  - Department of Petroleum Engineering, Faculty of Engineering, South Tehran Branch, 
      Islamic Azad University, P.O. Box 11365-4435, Tehran, Iran.
FAU - Abdollahzadeh, Yaser
AU  - Abdollahzadeh Y
AD  - Arian Tajhiz Azma Company, Tehran, Iran.
FAU - Asadollahzadeh, Mehdi
AU  - Asadollahzadeh M
AD  - Department of Petroleum Engineering, Faculty of Engineering, South Tehran Branch, 
      Islamic Azad University, P.O. Box 11365-4435, Tehran, Iran.
FAU - Hemmati, Alireza
AU  - Hemmati A
AD  - Department of Petroleum Engineering, Faculty of Engineering, South Tehran Branch, 
      Islamic Azad University, P.O. Box 11365-4435, Tehran, Iran.
FAU - Tavakoli, Hamed
AU  - Tavakoli H
AD  - The Young Research Club of the Islamic Azad University, Nour Branch, Nour, Iran. 
      Electronic address: ha.tavakoli159@yahoo.com.
FAU - Torkaman, Rezvan
AU  - Torkaman R
AD  - University College of Engineering, University of Tehran, Enghelab Ave., Tehran, 
      Iran.
LA  - eng
PT  - Journal Article
DEP - 20150204
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Organophosphorus Compounds)
RN  - 0 (Pesticides)
RN  - 0 (Soil)
RN  - 0 (Solvents)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - Gas Chromatography-Mass Spectrometry
MH  - Liquid Phase Microextraction/*methods
MH  - *Models, Theoretical
MH  - Organophosphorus Compounds/*analysis/*isolation & purification
MH  - Pesticides/analysis/isolation & purification
MH  - Soil/*chemistry
MH  - Solid Phase Extraction/*methods
MH  - Solvents/chemistry
MH  - *Ultrasonic Waves
MH  - Water Pollutants, Chemical/analysis/isolation & purification
OTO - NOTNLM
OT  - Chemometric tools
OT  - Dispersive-solidification liquid-liquid microextraction
OT  - Organophosphorus pesticides
OT  - Soil samples
OT  - Solid phase extraction
EDAT- 2015/03/17 06:00
MHDA- 2015/12/15 06:00
CRDT- 2015/03/16 06:00
PHST- 2014/09/23 00:00 [received]
PHST- 2015/01/22 00:00 [revised]
PHST- 2015/01/23 00:00 [accepted]
PHST- 2015/03/16 06:00 [entrez]
PHST- 2015/03/17 06:00 [pubmed]
PHST- 2015/12/15 06:00 [medline]
AID - S0039-9140(15)00059-4 [pii]
AID - 10.1016/j.talanta.2015.01.031 [doi]
PST - ppublish
SO  - Talanta. 2015 May;137:167-73. doi: 10.1016/j.talanta.2015.01.031. Epub 2015 Feb 
      4.