RÉSUMÉ
Objective To develop an analytical method by gas chromatograph-mass spectrometry(GC-MS) for the determination of organic chloride pesticides and polycyclic aromatic hydrocarbons in prophyra Methods The samples were extracted by an acetone-hexane(7∶3,V/V) mixture first,then were purified by C18 solid-phase extraction(SPE),and then were determined with GC-MS.Results The linear range was 0.01-5.0 ?g/ml,the limits of detection were 0.05-0.32 ng/g(dry weight) and 0.25-0.56 ng/g(dry weight)for organic chloride pesticides and polycyclic aromatic hydrocarbons respectively.The recovery rates and relative standard deviation for organic chloride pesticides were 74.27%-121.49% and 3.19 %-17.31% relatively;the recovery rates and relative standard deviation for polycyclic aromatic hydrocarbons were 65.10%-119.26% and 2.75%-14.11% relatively.Organic chloride pesticides were partly detected,but the detection rate of polycyclic aromatic hydrocarbons was higher.Fifteen polycyclic aromatic hydrocarbons were detected in all samples but dibenz(a,h)-anthracene.Conclusion This method is sensitive,accurate and applicable to the determination of organic chloride pesticides and polycyclic aromatic hydrocarbons in prophyra.