Determination of organochlorine pesticides in antioxidant peptide capsule by headspace solid-phase microextraction and gas chromatograpgy

Headspace solid-phase microextraction(HS-SPME) was used pre-concentration procedure for the simultaneous determination of organochlorine pesticides in antioxidant peptide capsule by gas chromatograpy with electron capture detector.Several parameters controlling SPME was studied and optimised: extraction mode,SPME fiber,extraction time and extraction temperature,desorption time and desorption temperature.Under optimal conditions,the correlation coefficients were more than 0.990 and good recoveries(range from 90% to 120%) were achieved.The mothod can be applied to the determination of trace amount of organochlorine pesticides in capsule health food.