分析化学Issue(9)：1270-1275,6.DOI:10.11895/j.issn.0253-3820.140227
加速溶剂萃取-同位素质谱分析土壤水的氢氧同位素
A Soil Water Extraction Method Using Accelerated Solvent Extraction Technique for Stable Isotope Analysis
摘要
Abstract
Soil water is one of the most important components in hydrological cycle. The stable hydrogen and oxygen isotopes in soil water have been increasingly used in the ecological, environment and hydrological research. In view of different techniques for extracting soil water, there is significant difference in theδD andδ18 O composition. This paper presents a method for analyzing hydrogen and oxygen isotopes in soil water by using elemental analyzer and isotope ratio mass spectrometry with accelerated solvent extraction for sample pretreatment. The conditions are: extraction solvent: dichloromethane, temperature: 100 ℃, pressure of 10. 3 MPa, static time:10 min. The samples were extracted three times, and with cycle values of four, four and three, respectively. Comparing with the added water, the deuterium and oxygen isotope values in the extracted soil water enrich 2. 12‰-4. 58‰ and 0. 17‰-0. 93‰, respectively. The reproducibility of replicate extractions of soil water is around ±0. 89‰ for δD and ±0. 37‰ for δ18 O.关键词
土壤水/氢同位素/氧同位素/加速溶剂萃取Key words
Soil water/Hydrogen isotope/Oxygen isotope/Accelerated solvent extraction引用本文复制引用
朱庆增,孙青,苏治国,谢曼曼,宋军勇,单雅冰,王宁,储国强..加速溶剂萃取-同位素质谱分析土壤水的氢氧同位素[J].分析化学,2014,(9):1270-1275,6.基金项目
国家科学自然基金(Nos.40772119,No.41302141)和中国地质调查局地质调查项目(No.12120113015400)资助。 （Nos.40772119,No.41302141）
