Determination of Organophosphorus Pesticide Multi-residues in Eel by Gas Chromatography with Gel Permeation Chromatography Clean-up
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Abstract:
A method was developed for determining of 11 organophosphorus pesticide residues in eel by Gas Chromatography (GC) with Gel Permeation Chromatography (GPC) clean-up. The samples were extracted using the solution of ethyl acetate and cyclohexane (1+1, V/V) with ultrasonic machine and then cleaned up by GPC. The elution needed was ccollected and concentrated to nearly dryness. The residue was dissolved with ethyl acetate for determination by GC-FPD. The limit of quantification (LOQ) was 0.01~0.02 mg/kg. The recovery ranges were 76.3%~106.8% when the added levels were from 0.02 mg/kg to 1.0 mg/kg. The relative standard deviations (RSD) were 2.6%~13.8%. The method was simple, sensitive and suitable for the analysis of pesticide residues.
