Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
46, Number 5, May/June 2008, pp. 424-429
A Rapid Multi-Residue Determination Method of
Herbicides in Grain by GC–MS-SIM
Libing Wang1, Cao Li2,
Chifang Peng2, Xiangqian
Li2, and Chuanlai Xu2, 1TianJin Academy of Inspection and Quarantine, 300457 TianJin,
PR China and 2School of Food Science and Technology, Southern
Yangtze University, 214036, WuXi, JiangSu Province, China
In this study, a gas chromatography–mass
spectrometry method is successfully developed for the determination
of 11 herbicide residues (alachlor, acetochlor, butachlor, pretilachlor,
metolachlor, dimethenamid, propachlor, napropamid, propanil,
atrazine, and metribuzin) in rice and soybeans. The sample is
extracted with acetone–water, degreased by liquid–liquid
partition, and purified through solid-phase extraction with Florisil.
Experiments on 5 fortification concentrations are carried out,
and the limit of determination is 0.02 mg/kg. The average recoveries
of soybean samples range from 63.3% to 96.0%, and the relative
standard deviations are from 2.14% to 11.2%. The average recoveries
of rice samples range from 76.8% to 102% and the relative standard
deviations are from 2.2% to 9.08%. The results indicate that
the method developed is fast, accurate, and easy to operate.
It also demonstrates that the method can meet the requirements
of simultaneous determination of 11 herbicides in rice and soybeans.
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