PMID- 21035660
OWN - NLM
STAT- MEDLINE
DCOM- 20110310
LR  - 20191210
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 83
IP  - 1
DP  - 2010 Nov 15
TI  - Analysis of sediment-associated insecticides using ultrasound assisted microwave 
      extraction and gas chromatography-mass spectrometry.
PG  - 171-7
LID - 10.1016/j.talanta.2010.09.002 [doi]
AB  - An ultrasound assisted microwave extraction (UAME) method was developed to 
      simultaneously extract five organophosphate (OP) and eight pyrethroid 
      insecticides from sediment. The optimized UAME conditions were to use 100ml of a 
      mixture of hexane and acetone (1:1, v/v) solution as the extraction solvents, and 
      extraction time, microwave and ultrasonic power settings of 6 min, 100 W and 50 
      W, respectively. Extracts were cleaned using solid phase extraction and analyzed 
      by gas chromatography-mass spectrometry in negative chemical ionization mode and 
      quantification was based on matrix-matched standard solutions along with internal 
      standard calibration. At the spiked concentrations of 1, 5 and 20 ng/g dry weight 
      (dw), recoveries of OPs were 77.6-122%, 65.2-128% and 75.6-141% with relative 
      standard deviations (RSDs) of 10.6-18.1%, 3.1-12.5% and 8.0-35.3%, respectively, 
      while recoveries of pyrethroids were 78.0-101%, 76.4-104% and 71.0-99.5% with 
      RSDs of 10.3-23.5%, 4.7-17.6% and 8.8-18.7%, respectively. Method detection 
      limits ranged from 0.31 to 0.45 ng/g dw for the OP insecticides and from 0.27 to 
      0.70 ng/g dw for the pyrethroid insecticides. The newly developed UAME method was 
      validated by comparing it to Soxhlet and sonication extraction methods. Better 
      recoveries were achieved for most OPs by the novel UAME method, whereas there was 
      no significant difference in recoveries for most of the pyrethroids. Finally, the 
      UAME method was used to quantify the target insecticides in field-contaminated 
      sediment samples which were collected in Guangzhou, China.
CI  - Copyright (c) 2010 Elsevier B.V. All rights reserved.
FAU - Li, Huizhen
AU  - Li H
AD  - State Key Laboratory of Organic Geochemistry, Guangzhou Institute of 
      Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
FAU - Wei, Yanli
AU  - Wei Y
FAU - You, Jing
AU  - You J
FAU - Lydy, Michael J
AU  - Lydy MJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Validation Study
DEP - 20100915
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Insecticides)
RN  - 0 (Organophosphates)
SB  - IM
MH  - Equipment Design
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Geologic Sediments/*analysis
MH  - Insecticides/*isolation & purification
MH  - *Microwaves
MH  - Organophosphates/*isolation & purification
MH  - Sensitivity and Specificity
MH  - Solid Phase Extraction/*instrumentation/methods
MH  - Ultrasonics/instrumentation/methods
EDAT- 2010/11/03 06:00
MHDA- 2011/03/11 06:00
CRDT- 2010/11/02 06:00
PHST- 2010/06/22 00:00 [received]
PHST- 2010/08/31 00:00 [revised]
PHST- 2010/09/03 00:00 [accepted]
PHST- 2010/11/02 06:00 [entrez]
PHST- 2010/11/03 06:00 [pubmed]
PHST- 2011/03/11 06:00 [medline]
AID - S0039-9140(10)00697-1 [pii]
AID - 10.1016/j.talanta.2010.09.002 [doi]
PST - ppublish
SO  - Talanta. 2010 Nov 15;83(1):171-7. doi: 10.1016/j.talanta.2010.09.002. Epub 2010 
      Sep 15.