COLOR DEVELOPMENT BASED ON THE ION ASSOCIATION OF MOLYBDOPHOSPHATE WITH CATIONIC DYE CHLORO-MALACHITE GREEN

被引：8

作者：

MOTOMIZU, S

HAGIWARA, T

YOKOYAMA, A

OSHIMA, M

机构：

[1] Department of Chemistry, Faculty of Science, Okayama University, Tsushimanaka

来源：

ANALYTICAL SCIENCES | 1993年 / 9卷 / 06期

关键词：

COLOR DEVELOPMENT; ION ASSOCIATION; MOLYBDOPHOSPHATE; CHLORO-MALACHITE GREEN;

D O I：

10.2116/analsci.9.817

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Color development based on the ion association of molybdophosphate with a cationic dye, a chloro derivative of Malachite Green (Cl-MG), was investigated in an aqueous acidic solution. Cl-MG is very stable as its quinoid form in an acidic medium, and can easily react with molybdophosphate to form a green ion associate, which shows maximum absorption at 685 nm. The experimental conditions for optimum color development have been examined. This color development reaction could be applied to the determination of trace amounts of orthophosphate. The molar absorptivity was 1.3X10(5) dm3 mol-1 cm-1 at 685 nm.

引用

页码：817 / 820

页数：4

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