4.2 Article

A single column separation method for barium isotope analysis of geologic and hydrologic materials with complex matrices

期刊

GEOCHEMICAL TRANSACTIONS
卷 22, 期 1, 页码 -

出版社

BMC
DOI: 10.1186/s12932-021-00077-z

关键词

Barium; Ba isotopes; Barite; MC-ICPMS; Column chromatography

资金

  1. U.S. Department of Energy, Office of Fossil Energy Advanced Carbon Storage and Onshore Unconventional portfolios
  2. Oak Ridge Institute for Science and Education research internship
  3. Department of Energy, National Energy Technology Laboratory, an agency of the United States Government
  4. Leidos Research Support Team (LRST)

向作者/读者索取更多资源

The method presented in the paper effectively separates barium from a range of geologic and hydrologic materials using readily available materials and disposable columns. Major matrix elements from almost any natural material are separated from barium in a single column pass, and the method also reduces or eliminates isobaric interferences from lanthanum and cerium.
The increasing significance of barium (Ba) in environmental and geologic research in recent years has led to interest in the application of the Ba isotopic composition as a tracer for natural materials with complex matrices. Most Ba isotope measurement techniques require separation of Ba from the rest of sample prior to analysis. This paper presents a method using readily available materials and disposable columns that effectively separates Ba from a range of geologic and hydrologic materials, including carbonate minerals, silicate rocks, barite, river water, and fluids with high total dissolved solids and organic content such as oil and gas brines, rapidly and without need for an additional cleanup column. The technique involves off-the-shelf columns and cation exchange resin and a two-reagent elution that uses 2.5 N HCl followed by addition of 2.0 N HNO3. We present data to show that major matrix elements from almost any natural material are separated from Ba in a single column pass, and that the method also effectively reduces or eliminates isobaric interferences from lanthanum and cerium.

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