Determination of nine organophosphorus pesticides in cereals and kidney beans by capillary gas chromatography with flame photometric detection.
A method is developed for the determination of nine organophosphorus pesticide residues in cereals and kidney beans by capillary gas chromatography with flame-photometric detection. In this method, dichloromethane is used for clean-up after liquid-liquid extraction. It is shown that good separations are obtained using a fused-silica capillary column (DB-1701) by the optimized temperature program. In the spiked levels of 0.012-0.43 mg/kg, the recoveries are from 83.7% to 107%, with the relative standard deviation between 3.2% and 13% and limits of detection from 8.2 to 15 microg/kg. The method is rapid, sensitive, and practical.
Tang
Bo
B
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China. tangb@sdnu.edu.cn
Zhang
Jin-E
JE
Zang
Li-Guo
LG
Zhang
Yao-Zhong
YZ
Li
Xiang-Yang
XY
Zhou
Li
L
D002849:Chromatography, Gas / Q000379:methods*; D002523:Edible Grain / Q000737:chemistry*; D008452:Maximum Allowable Concentration; D008752:Methylene Chloride / Q000737:chemistry; D009943:Organophosphorus Compounds / Q000032:analysis*; D063086:Organothiophosphates; D009946:Organothiophosphorus Compounds / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D027805:Phaseolus / Q000737:chemistry*; D010783:Photometry / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D009943:Organophosphorus Compounds; D063086:Organothiophosphates; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; C056490:methyl isofenphos; C001182:ethoprop; D008752:Methylene Chloride