[Determination of 15 organophosphorus pesticides in cucumber, tomato and pepper samples by capillary gas chromatography with gel permeation chromatographic clean-up].
Fifteen organophosphorus pesticide residues in vegetable samples were extracted and cleaned-up by gel permeation chromatography and detected by capillary GC-FPD. An alternative validation method was established based on GC-NPD detection on an HP-1701 column. The eluting profiles of 15 compounds on a gel permeation column (10 mm i.d. x 200 mm, SX-3) eluted by 1 mL/min cyclohexane-ethyl acetate (volume ratio of 1:1) were established according to GC quantitation. Minimum detection limits of this method were between 5 x 10(-4) mg/kg to 5 x 10(-3) mg/kg. The average fortified recoveries and coefficients of variation of the method were determined. The results show that recoveries are between 77.8%-106%, with an average RSD of 0.10%-16.6%.
Pan
Can-ping
CP
Department of Applied Chemistry, China Agricultural University, Beijing 100094, China. canpingp@mail.cau.edu.cn
Wang
Li-min
LM
Kong
Xiang-yu
XY
Jiang
Shu-ren
SR
Qian
Chuan-fan
CF
D002212:Capsicum / Q000737:chemistry; D002849:Chromatography, Gas / Q000379:methods; D002850:Chromatography, Gel / Q000295:instrumentation / Q000379:methods; D018553:Cucumis sativus / Q000737:chemistry; D005504:Food Analysis / Q000295:instrumentation / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D007306:Insecticides / Q000032:analysis*; D018551:Solanum lycopersicum / Q000737:chemistry; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D014675:Vegetables / Q000737:chemistry*
D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues