DIFFERENTIAL KINETIC ANALYSIS OF ALKALINE-EARTH IONS USING STOPPED-FLOW SPECTROPHOTOMETRY

被引：69
作者：
PAUSCH, JB
MARGERUM, DW
机构：
[1] Department of Chemistry, Purdue University, Lafayette
来源：
ANALYTICAL CHEMISTRY | 1969年 / 41卷 / 02期
关键词：
D O I：
10.1021/ac60271a007
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Exchange reactions between Pb (II) and the alkaline-earth complexes of trans-l,2-diaminocyclohexane-N,N,N',N'-tetraacetate (CyDTA) proceed at sufficiently different velocities to permit the kinetic determination of mixtures of Mg, Ca, Sr, and Ba. The rate-determining step with each complex is its reaction with hydrogen ion. Ultraviolet absorbance of PbCyDTA2- is used to monitor the reaction but there is no kinetic dependence on Pb (II). Reaction rate constants are in the ratio of 1:6.5:96:1660forMg:Ca:Sr:Ba. The determinations are rapid and free of interference from other metal ions. © 1969, American Chemical Society. All rights reserved.
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页码：226 / &
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