PMID- 18558137
OWN - NLM
STAT- MEDLINE
DCOM- 20080717
LR  - 20171116
IS  - 1873-4324 (Electronic)
IS  - 0003-2670 (Linking)
VI  - 620
IP  - 1-2
DP  - 2008 Jul 14
TI  - Homogeneous liquid-liquid extraction combined with gas chromatography-electron 
      capture detector for the determination of three pesticide residues in soils.
PG  - 162-9
LID - 10.1016/j.aca.2008.05.021 [doi]
AB  - In this study, a new method was developed for analyzing malathion, cypermethrin 
      and lambda-cyhalothrin from soil samples by using homogeneous liquid-liquid 
      extraction (HLLE) and gas chromatography with electron capture detector (GC-ECD). 
      Acetone was used as extraction solvent for the extraction of target pesticides 
      from soil samples. When the extraction process was finished, the target analytes 
      in the extraction solvent were rapidly transferred from the acetone extract to 
      carbon tetrachloride, using HLLE. Under the optimum conditions, linearity was 
      obtained in the range of 0.05-40 microg kg(-1) for malathion, 0.04-10 microg 
      kg(-1) for lambda-cyhalothrin and 0.05-50 microg kg(-1) for cypermethrin, 
      respectively. Coefficients of correlation (r(2)) ranged from 0.9993 to 0.9998. 
      The repeatability was carried out by spiking soil samples at concentration levels 
      of 2.5 microg kg(-1) for lambda-cyhalothrin, and 10 microg kg(-1) for malathion 
      and cypermethrin, respectively. The relative standard deviations (RSDs) varied 
      between 2.3 and 9.6% (n=3). The limits of detection (LODs), based on 
      signal-to-noise ratio (S/N) of 3, varied between 0.01 and 0.04 microg kg(-1). The 
      relative recoveries of three pesticides from soil A1, A2 and A3 at spiking levels 
      of 2.5, 5 and 10 microg kg(-1) were in the range of 82.20-91.60%, 88.90-110.5% 
      and 77.10-98.50%, respectively. In conclusion, the proposed method can be 
      successfully applied for the determination of target pesticide residues in real 
      soil samples.
FAU - Wang, Xuedong
AU  - Wang X
AD  - School of Environmental Science and Public Health, Wenzhou Medical College, 
      Wenzhou 325035, China. zjuwxd@yahoo.com.cn
FAU - Zhao, Xinna
AU  - Zhao X
FAU - Liu, Xiujuan
AU  - Liu X
FAU - Li, Yanyan
AU  - Li Y
FAU - Fu, Lingyan
AU  - Fu L
FAU - Hu, Jia
AU  - Hu J
FAU - Huang, Changjiang
AU  - Huang C
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080520
PL  - Netherlands
TA  - Anal Chim Acta
JT  - Analytica chimica acta
JID - 0370534
RN  - 0 (Organic Chemicals)
RN  - 0 (Pesticide Residues)
RN  - 0 (Soil)
RN  - 0 (Solvents)
RN  - CL2T97X0V0 (Carbon Tetrachloride)
SB  - IM
MH  - Carbon Tetrachloride
MH  - Chromatography, Gas/*methods
MH  - *Electrons
MH  - Molecular Structure
MH  - Organic Chemicals/chemistry
MH  - Pesticide Residues/*analysis/*chemistry
MH  - Soil/*analysis
MH  - Solvents/chemistry
EDAT- 2008/06/19 09:00
MHDA- 2008/07/18 09:00
CRDT- 2008/06/19 09:00
PHST- 2008/04/01 00:00 [received]
PHST- 2008/05/12 00:00 [revised]
PHST- 2008/05/13 00:00 [accepted]
PHST- 2008/06/19 09:00 [pubmed]
PHST- 2008/07/18 09:00 [medline]
PHST- 2008/06/19 09:00 [entrez]
AID - S0003-2670(08)00941-0 [pii]
AID - 10.1016/j.aca.2008.05.021 [doi]
PST - ppublish
SO  - Anal Chim Acta. 2008 Jul 14;620(1-2):162-9. doi: 10.1016/j.aca.2008.05.021. Epub 
      2008 May 20.