摘要
在硫酸介质中，抗坏血酸存在下，铁（Ⅲ）催化溴酸钾氧化结晶紫褪色，据此，建立了一种测定痕量铁（Ⅲ）的简单、灵敏的分析方法─催化比色法。该法线性范围是８～８０ｎｇ／２５ｍＬ，灵敏度为３２×１０－１０ｇ／ｍＬ。用于水及人发中痕量铁的测定，结果满意。
A simple and sensitive catalytic colorimetry has been developed for determining trace Fe(Ⅲ). It is based on the catalysis of Fe(Ⅲ) to decoloration of crystal violet oxidized with potassium bromate in diluted sulfuric acid medium in the presence of ascorbic acid. The linear range of determination is from 8 to 80 ng/25mL Fe(Ⅲ). The sensitivity is 3.2×10 -10 g/mL. The method has been applied to the determination of trace Fe(Ⅲ) in natural water and human hair with satisfactory results.
出处
《四川农业大学学报》
CSCD
1998年第3期352-354,共3页
Journal of Sichuan Agricultural University
关键词
溴酸钾
结晶紫
铁
测定
催化光度法
POTASSIUM BROMATE CRYSTAL VIOLET CATALYTIC COLORIMETRY DETERMINATION IRON(Ⅲ).
