快速溶剂萃取-气相色谱-质谱法测定土壤中15种硝基苯类化合物

通过气相色谱-质谱法(GC-MS)，建立土壤中15 种硝基苯类化合物的快速测定方法，以期为土壤和固体物中硝基苯类化合物残留量的测定提供参考。样品中的15 种硝基苯类化合物经正己烷和丙酮(1:1, V:V)溶剂萃取，硅酸镁小柱净化，10 mL正己烷:丙酮混合溶液(1:1, V:V)洗脱并干燥浓缩后，用GCMS测定，内标法定量。结果表明：此方法线性关系良好，相关系数均大于0.995，15 种硝基苯类化合物的回收率在71.6%~119%之间，相对标准偏差在0.2%~1.1%之间，检出限在0.05~1.31 μg/kg 之间。该方法简便、准确度好、灵敏度高，节约人力财力，满足土壤中硝基苯类化合物的测定要求。

Determination of Nitrobenzene Compounds in Soil by ASE-GC-MS

A method was developed for the determination of nitrobenzenes?compound in soil by GC-MS with accelerated solvent extraction. Method of drug samples for nitrobenzenes?compound by acetone and n-hexane(1:1) extraction，solid-phase extraction separation，drying and concentrating，analysis by GC-MS with ASE，internal standard method for the quantitative analysis.The results were present as follows.The method was suitable for the determination of nitrobenzenes?compound using the acetone and n-hexane(1:1) as elution solvent in soil.It had good separation effect and the calibration curves showed good linear relationship. The correlation coefficients ＞0.995. Samples extracted showed the highest recovery. The recoveries of nitrobenzenes?compound were in range of 71.6%～119% and the relative standard deviations were 0.2%～1.1%. The detection limits were 0.05～1.31μg/kg.The method had merits of simplicity,accuracy,sensitivity and it can meet the test requirements of nitrobenzenes?compound in soil.