快速溶剂萃取(S-916)/GC-MS法测定土壤中15种多环芳烃

本文建立了S-916快速溶剂萃取仪(Buchi瑞士)快速萃取-气相色谱-质谱仪(GC-MS联用测定土壤中15种多环芳烃(PAHs)含量的方法。土壤样品经正己烷、丙酮快速溶剂萃取,除水浓缩后,利用硅酸镁小柱进行净化,直接进GC-MS测定。结果表明,在5. 0～1000. 0μg/L浓度范围内,15种PAHs的相关系数均在0. 996以上,RF RSD<12%,加标回收率在80%～117%之间,15种PAHs的最低检出限均低于0. 40μg·kg^-1.该方法灵敏、快速、准确可靠,完全满足实验室对土壤中PAHs的检测要求,可为土壤中多环芳烃(PAHs)的污染情况提供快速检测依据。

Determination of 15 Polycyclic Aromatic Hydrocarbons in Soil by Accelerated Solvent Extraction (S-916)/GC-MSDENG

An analytical method for the determination of 15 polycyclic aromatic hydrocarbons(PAHs)in soil by accelerated solvent extraction(Buchi Switzerland)coupled with gas chromatography-mass spectrometry(GC-MS)was developed.The soil samples were quickly extracted by n-hexane and acetone,and then purified by magnesium silicate column.the samples were directly subjected to GC-MS after dewater.The results showed that the correlation coefficients of 15 PAHs were above 0.996 in the range of 51000μg·L^-1,RF RSD<12%,the recoveries of spiked standards ranged from 80% to 117%,and the minimum detection limits of 15 PAHs were all below 0.40μg·kg^-1.The method is fast,simple and accurate,and fully meets the daily requirements for the detection of PAHs in the soil,and can provide a rapid detection basis for soil pollutants.