PMID- 16929837
OWN - NLM
STAT- MEDLINE
DCOM- 20100707
LR  - 20161018
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 24
IP  - 3
DP  - 2006 May
TI  - [Analysis of pesticide multiresidues in rice by gas chromatography-mass 
      spectrometry coupled with solid phase extraction].
PG  - 228-34
AB  - A new analytical method was developed to simultaneously determine multiple 
      pesticide residues in rice including organophosphorus, organochlorine, carbamate 
      and pyrethroid. First, the solvents for pesticide extraction were selected for 
      optimization. Eight solvents were screened to find that the extraction efficiency 
      with dichloromethane was the best. Second, clean-up was performed by solid phase 
      extraction using a Florisil cartridge. Various mixtures of hexane and acetone 
      were tested to show that the mixture of hexane-acetone (4:1, v/v) had the best 
      performance. The clean-up helped the sample purification significantly. The 
      prepared sample was analyzed using gas chromatography-mass spectrometry (GC-MS) 
      in selected ion monitoring (SIM) mode. The pesticides were identified with 
      retention time and selected ions and their relative abundances, and they were 
      quantified based on extract of spiking standards in a blank sample. The limits of 
      detection (LODs) were evaluated on the values of the lower concentration 
      fortified sample under the signal-to-noise ratio of 3:1. The recoveries and 
      relative standard deviations (RSDs) were checked by adding pesticide standard 
      solution at two levels to untreated samples, and the triplicate analysis of the 
      samples were carried out for each spiked level. The LODs were at microg/kg level. 
      The average recoveries of most pesticides were from 75% to 120 %. The RSDs were 
      less than 10.4% (n = 3). These results indicated that this method is simple, 
      rapid, sensitive for the simultaneous determination requirements of multiple 
      pesticide residues in rice.
FAU - Liu, Pengyan
AU  - Liu P
AD  - College of Chemistry and Environmental Science, Hebei University, Baoding, China. 
      pyliu@yahoo.com.cn
FAU - Liu, Qingxue
AU  - Liu Q
FAU - Ma, Yusong
AU  - Ma Y
FAU - Liu, Jinwei
AU  - Liu J
FAU - Jia, Xuan
AU  - Jia X
LA  - chi
PT  - English Abstract
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
RN  - 0 (Pesticide Residues)
RN  - 0 (Pesticides)
SB  - IM
MH  - Food Contamination/*analysis
MH  - Gas Chromatography-Mass Spectrometry/*methods
MH  - Oryza/*chemistry
MH  - Pesticide Residues/*analysis
MH  - Pesticides/analysis
MH  - Solid Phase Extraction/*methods
EDAT- 2006/08/26 09:00
MHDA- 2010/07/08 06:00
CRDT- 2006/08/26 09:00
PHST- 2006/08/26 09:00 [pubmed]
PHST- 2010/07/08 06:00 [medline]
PHST- 2006/08/26 09:00 [entrez]
PST - ppublish
SO  - Se Pu. 2006 May;24(3):228-34.