炼钢厂炼焦车间土壤中PAHs的超临界流体萃取-色质联用分析方法研究

Study on the Analytical Method of Polycyclic Aromatic Hydrocarbons from the Soil of Coking Workshop of Steel Plant Using SFE and GCMS

超临界流体萃取炼钢厂炼焦车间土壤中多环芳烃（ＰＡＨｓ）的最佳萃取条件为４０ＭＰａ，８０℃，０５％甲醇动态改性液体ＣＯ２１０ｍＬ时，对土样进行超临界流体萃取、色质联用分析，并与索氏萃取法进行比较。土样中能准确定性的多环芳烃４４种，其中能定量分析的３１种。色谱定量的回收率均值为７８５％～１０４１％，相对标准偏差为５０％～１５６％。

Supercritical fluid extraction(SFE)was optimized for the extraction of the polycyclic aromatic hydrocarbons(PAHs)from the soil of coking workshop of steel plant.The PAHs were extracted by using SFE under the optimum extraction condition:40 MPa, 80℃,10 mL liquid CO 2 modified with 0.5% methanol,and the PAHs were analyzed by GCMS.The results were compared with Soxhelt extraction.44 kinds of PAHs were qualified and 31 kinds were quantitated.The mean recovery was in the range of 785% ～1041%,and the relative standard deviation was in the range of 50%～156%.