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.

中文翻译：

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一种用于复杂基质地质和水文材料钡同位素分析的单柱分离方法

近年来，钡 (Ba) 在环境和地质研究中的重要性日益增加，这引起了人们对 Ba 同位素组成作为具有复杂基质的天然材料示踪剂的应用的兴趣。大多数 Ba 同位素测量技术需要在分析之前将 Ba 与样品的其余部分分离。本文介绍了一种使用现成的材料和一次性柱子的方法，可有效地将 Ba 从一系列地质和水文材料中分离出来，包括碳酸盐矿物、硅酸盐岩、重晶石、河水以及具有高总溶解固体和有机含量的流体，如石油和气体盐水，快速且无需额外的净化柱。该技术包括现成的色谱柱和阳离子交换树脂以及使用 2.5 N HCl 然后添加 2 的双试剂洗脱。0 N HNO3。我们提供的数据表明，几乎所有天然材料中的主要基体元素都可以在单次柱程中与 Ba 分离，并且该方法还有效地减少或消除了镧和铈的同量异位素干扰。