KINETIC-STUDY OF SPECIATION OF NICKEL(II) BOUND TO A FULVIC-ACID

被引：58

作者：

LAVIGNE, JA ^{[1
]}

LANGFORD, CH ^{[1
]}

MAK, MKS ^{[1
]}

机构：

[1] CONCORDIA UNIV,DEPT CHEM,MONTREAL H3G 1M8,QUEBEC,CANADA

来源：

ANALYTICAL CHEMISTRY | 1987年 / 59卷 / 21期

关键词：

ACIDS - Extraction - CHEMICAL REACTIONS - Reaction Kinetics - MATHEMATICAL TRANSFORMATIONS - Laplace Transforms - NICKEL AND ALLOYS - SODIUM COMPOUNDS;

D O I：

10.1021/ac00148a018

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The distinguishable species present in solutions of Ni(II) equilibrated with a soil fulvic acid (FA) are studied by a kinetic method of analysis based on reaction with 4-(2-pyridylazo)resorchinol (PAR). An approximate Laplace transform is used to assign the number of species and a nonlinear regression routine is used to obtain final parameter values. Numerical methods are carefully evaluated by using simulated data including synthetic noise. Four rate constants of 0. 67, 0. 15, 0. 021, and 0. 0026 s** minus **1 consistently represent the samples initially equilibrated at pH 4, 5, and 6. 4.

引用

页码：2616 / 2620

页数：5

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