ALUMINUM PYROCATECHOL VIOLET REACTIVITY WITH VARIOUS COMPLEXING AGENTS

被引：16
作者：
KRAMER, JR
GLEED, J
GRACEY, K
机构：
[1] McMaster University, Department of Geology, Hamilton
来源：
ANALYTICA CHIMICA ACTA | 1994年 / 284卷 / 03期
关键词：
SPECTROPHOTOMETRY; ALUMINUM; COMPLEXOMETRY; PYROCATECHOL VIOLET;
D O I：
10.1016/0003-2670(94)85065-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A spectrophotometric method for determining the speciation of aluminum using pyrocatechol violet (PCV) is tested on a series of known ligands over a range of concentrations and at two fixed pH values. The procedure assumes that the colorimetric signal is defined by the competition of the Al-ligand complex with Al-PCV. The stability constants determined are in agreement with literature values. Time to steady state is more than 10 min. A procedure for determining the conditional stability constant, the total ligand concentration and the reactive Al at a fixed pH is proposed.
引用
收藏
页码：599 / 604
页数：6
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