The simultaneous separation of twenty-one metal cations using capillary isotachophoresis with on-column conductivity detection

J. E. Prest, P. Fielden
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引用次数: 8

Abstract

The possibility of using capillary isotachophoresis coupled with on-column conductivity detection for the separation of complex metal cation mixtures has been demonstrated. The simultaneous separation of a mixture of the 21 metal cations Ca2+, Mg2+, Mn2+, Co2+, Ni2+, Zn2+, Be2+, La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Cu2+, Y3+, Ho3+, Er3+, Tm3+, Yb3+ and Lu3+ has been reproducibly achieved using aqueous electrolytes. Calibration curves were produced for two of these ions, Co2+ and Er3+. A linear response was observed over the range from 0.02 mmol dm–3 to 1.70 mmol dm–3 for cobalt and 0.05 mmol dm–3 to 1.00 mmol dm–3 for erbium. These curves allowed limits of detection to be calculated as 0.015 mmol dm–3 for cobalt and 0.045 mmol dm–3 for erbium.
毛细管等速电泳柱上电导率检测同时分离21种金属阳离子
利用毛细管等速电泳结合柱上电导率检测分离复杂金属阳离子混合物的可能性已经被证明。用水电解质可同时分离21种金属阳离子Ca2+、Mg2+、Mn2+、Co2+、Ni2+、Zn2+、Be2+、La3+、Ce3+、Pr3+、Nd3+、Sm3+、Eu3+、Gd3+、Cu2+、Y3+、Ho3+、Er3+、Tm3+、Yb3+和Lu3+。对其中两种离子Co2+和Er3+进行了标定。在0.02 mmol dm-3 ~ 1.70 mmol dm-3和0.05 mmol dm-3 ~ 1.00 mmol dm-3范围内观察到钴和铒的线性响应。这些曲线允许计算出钴的检出限为0.015 mmol dm-3,铒的检出限为0.045 mmol dm-3。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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