加速溶剂萃取-气相色谱质谱法同时测定土壤及沉积物中34种有机氯农药及18种多氯联苯类化合物

Simultaneous Determination of 34 Organochlorine Pesticides and 18 Polychlorinated Biphenyls in Soil and Sediment by Accelerated Solvent Extraction-Gas Chromatography-mass Spectrometry

建立了加速溶剂萃取-气相色谱质谱法同时测定34种有机氯农药(OCPs)和18种多氯联苯类化合物(PCBs)的方法。当取样量为10.0g时,52种有机化合物的检出限为0.03~0.29μg/kg,以空白样品为基体进行加标回收试验,平均回收率为44.7%~123.0%,相对标准偏差(RSD,n=7)为1.8%~21.5%。该方法灵敏度高,实现了低浓度有机化合物的定量分析,分析结果准确可靠,满足土壤和沉积物中34种有机氯农药和18种多氯联苯类化合物分析的要求。

A method for the simultaneous determination of 34 organochlorine pesticides (OCPs) and 18 polychlorinated biphenyls (PCBs) by accelerated solvent extraction-gas chromatography-mass spectrometry was established.Experiments show that the method can simultaneously determine the above 52 organic compounds.The method is simple,accurate and sensitive.When the sample size was 10.0g,the detection limits of 52 organic compounds were 0.03~0.29 μg/kg.The standard addition recovery test was carried out with blank samples as matrix.The average recovery rates were between 44.7% and 123.0%,and the relative standard deviations (RSD,n =7) were 1.8%~21.5%.The method is sensitive,accurate and reliable for quantitative analysis of low-content organic compounds,and meets the requirements for analysis of 34 organochlorine pesticides and 18 polychlorinated biphenyls in soil and sediment.