加速溶剂萃取提取土壤中正构烷烃的方法研究

基金项目:
国家地质实验测试中心基本科研业务费项目资助

国土资源部地质大调查项目资助（1212350816015）

国家自然科学基金项目资助（40772119；40972121）

国土资源部百人计划项目资助

收稿日期: 2009-02-11

修回日期: 2009-12-10

刊出日期: 2010-04-28

Study on Accelerated Solvent Extraction of n-alkanes in Soil Samples

Received Date: 11 February 2009

Revised Date: 10 December 2009

Publish Date: 28 April 2010

摘要: 建立了加速溶剂萃取技术提取-柱色谱分离-气相色谱分析土壤样品中正构烷烃的方法。优化了压力、温度、静态时间、循环次数等参数。随着温度、静态时间、循环次数和压力的增加，正构烷烃短碳链、长碳链和总正构烷烃的量逐渐增加。加速溶剂萃取提取土壤中正构烷烃的条件是：萃取温度150℃，萃取压力10.3 MPa，循环2次，静态提取时间10 min。加速溶剂萃取-柱色谱分离-气相色谱法测定土壤中正构烷烃的方法精密度（RSD）为8%～23%。加速溶剂萃取法提取总正构烷烃量、短碳链正构烷烃量显著高于索氏抽提法的提取量。
- 加速溶剂萃取；索氏抽提；正构烷烃；土壤
Abstract: The paper described the determination of n-alkanes in soil samples by gas chromatography with accelerated solvent extraction (ASE) for sample pretreatment. The main factors which affect the extraction yield of n-alkanes by ASE, such as the temperature, pressure, static time and cycle times were discussed. The results showed that the optimum parameters for n-alkanes extraction from soil samples were： temperature of 150℃, pressure of 10.3 MPa, static time of 10 min and 2 cycles. The precision of method was 8% to 23%RSD. The results also showed that the extraction efficiency of total n-alkanes and short carbon chain n-alkanesby ASE was superior to the conventional Soxhlet extraction.
- accelerated