Methods for concentrating metal ions prior to analysis by ion chromatography or capillary electrophoresis

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• 作者：Fritz ; James S. ; Freeze ; Ronald C. ; Thornton ; Michelle J. ; Gjerde ; Douglas T.
• 关键词：Sample preparation ; Metal ions
• 刊名：Journal of Chromatography A
• 出版年：1996
• 出版时间：July 19, 1996
• 年：1996
• 卷：739
• 期：1-2
• 页码：57-61
• 全文大小：376 K

文摘

In ion chromatography and particularly in capillary electrophoresis, it is often necessary to preconcentrate metal ions to be determined and to remove larger amounts of matrix ions such as Na⁺, Mg²⁺, and Ca²⁺. Several general techniques for concentration of selected metal ions are reviewed and illustrated by specific examples. These techniques include the use of chelating resins and the formation of soluble complexes in solution with subsequent retention by ordinary solid-phase extraction (SPE) columns.