摘要
在硫酸介质中，基于铱（Ⅳ）对高碘酸钾氧化二甲基二氨基吨基氯（吖啶红，AR）褪色反应的催化作用，建立了一个测定铱的新催化动力学光度法。研究了该指示反应的最佳反应条件和动力学参数。在优化的条件下，反应速率与铱的质量浓度在0．16～32．0μg／L范围内呈良好线性关系，检出限为1．2×10^-4μg／mL。方法已用于冶金产品和岩矿石中痕量铱的测定。
Based on the catalytic effect of iridium（Ⅳ） on the oxidation reaction of dimethyldiminoxanthenyl chloride （acridine red, AR） by KIO4 in the H2SO4 medium, a new kinetic spectrophotometric method for determination of trace iridium（Ⅳ） was established. The optimum conditions and kinetic parameters were investigated. Under the selected conditions, a good linear relationship could be obtained between the catalytic reaction rate and the concentration of iridium（Ⅳ） in the range of 0.16-32.0μg/L with detection limit of 1.2×10^-4μg/mL. The method has been successfully applied for the determination of iridium in the metallurgical products and ore samples.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2006年第3期25-27,共3页
Metallurgical Analysis
基金
大理学院科研基金(2002X03)
关键词
铱(Ⅳ)
吖啶红
高碘酸钾
催化动力学光度法
iridium（Ⅳ）
arcidine red
potassium periodate
catalytic kinetic spectrophotometry
