Siriraks A, Kingston H M, Riviello J M
Center for Analytical Chemistry, National Institute of Standards and Technology, Gaithersburg, Maryland 20899.
Anal Chem. 1990 Jun 1;62(11):1185-93. doi: 10.1021/ac00210a018.
The development and evaluation of a new method for the determination of trace transition and rare-earth elements based on the combination of chelation and ion chromatography are described. The new method, chelation ion chromatography (Chelation IC), uses a chelating column to concentrate and separate transition and rare-earth elements from the common alkali and alkaline-earth metals, as well as other matrix components, prior to analysis by ion chromatography. The sample fraction from the chelating column contains only the concentrated analyte ions, thus eliminating interfering matrix components from complex matrices such as seawater and digested biological, botanical, and geological materials. This combination of chelation and ion chromatography provides a technique that makes possible the determination of trace elements in complex matrices that have proven to be difficult or impossible to analyze by ion chromatography or conventional atomic spectroscopy techniques.
本文描述了一种基于螯合与离子色谱联用的痕量过渡元素和稀土元素测定新方法的开发与评估。这种新方法，即螯合离子色谱法（Chelation IC），在通过离子色谱分析之前，使用螯合柱将过渡元素和稀土元素与常见的碱金属和碱土金属以及其他基质成分进行富集和分离。来自螯合柱的样品馏分仅包含浓缩的分析物离子，从而消除了复杂基质（如海水以及消化后的生物、植物和地质材料）中的干扰性基质成分。螯合与离子色谱的这种联用提供了一种技术，使得在复杂基质中测定痕量元素成为可能，而这些复杂基质已被证明难以或无法通过离子色谱或传统原子光谱技术进行分析。
