MSPD-ASE-GC法测定土壤中石油烃(C_(10)-C_(40))  

Determination of Petroleum Hydrocarbons(C_(10)-C_(40))in Soil by Matrix Solid-phase Dispersion-accelerated Solvent Extraction and Gas Chromatography

作　　者：吴昊 帅清昱 郭丽 葛红波 WU Hao;SHUAI Qingyu;GUO Li;GE Hongbo(Hubei Ecological Environmental Monitoring Central Station,Hubei Wuhan 430072;Wuhan Fangji Environment Techndogy Co.,Ltd.,Hubei Wuhan 430000,China)

机构地区：[1]湖北省生态环境监测中心站,湖北武汉430072 [2]武汉方基环境科技有限公司,湖北武汉430000

出　　处：《广州化工》2024年第19期139-142,共4页GuangZhou Chemical Industry

基　　金：湖北省级环保科研项目(No:2021HB-ZC04)。

摘　　要：通过优化仪器分析方法和样品前处理条件,建立基质固相分散(MSPD)-加速溶剂萃取(ASE)-气相色谱法(FID检测器)测定土壤中石油烃(C_(10)-C_(40))的分析方法。称取10.0 g冻干处理后的土壤样品与2.0 g硅藻土和5.0 g硅酸镁吸附剂分散均匀,以正己烷为提取剂,经加速溶剂萃取、无水硫酸钠脱水、氮吹浓缩定容至1.0 mL,气相色谱测定,外标法定量。石油烃(C_(10)-C_(40))在0~9300 mg/L浓度范围内线性良好,相关系数可达0.9999,方法检出限为3 mg/kg,对空白石英砂和实际土壤样品进行加标测定,平行分析(n=6)的相对标准偏差在15.0%以内,加标回收率为81.2%~96.0%。该方法实现了土壤样品的同步提取和净化,简化了样品的前处理步骤,提高了样品分析效率,精密度良好、准确度高,可以满足土壤中石油烃(C_(10)-C_(40))测定的要求。An analytical method was established for the determination of petroleum hydrocarbons(C_(10)-C_(40))in soil by gas chromatography with matrix solid-phase dispersion-accelerated solvent extraction.10.0 g soil sample was intermixed with 2.0 g diatomite and 5.0 g magnesium silicate absorbent,and then the sample mixture was transferred into the extraction cell.The soil sample particles were extracted with n-hexane and the extract was concentrated by nitrogen blowing to 1.0 mL.Petroleum hydrocarbons(C_(10)-C_(40))in the concentrated solution was detected by GC.External standard method was used for quantification.Petroleum hydrocarbons(C_(10)-C_(40))had a good linearity within 0 to 9300 mg/L(r=0.9999),the detection limit was 3 mg/kg,the relative standard deviation of the method precision was within 15.0%,and the method recovery ratio was 81.2%to 96.0%.This method had good precision,high accuracy,simple operation,and realized the simultaneous extraction and purification,was suitable for the determination of petroleum hydrocarbons(C_(10)-C_(40))in soil samples.

关 键 词：基质固相分散 加速溶剂萃取 气相色谱法 土壤 石油烃(C_(10)-C_(40)) 

分 类 号：O657.7[理学—分析化学]