摘要
研究发现 :在硫酸介质中Cu(Ⅱ )和Fe(Ⅲ )能同时催化溴酸钾氧化酸性铬蓝K的褪色反应 ,但二者存在一定的速率差异 ,反应速率常数之比随时间而变化 ,且吸光度的加和性不佳。运用了三层Levenberg Marquardt优化BP神经网络处理实验数据 ,实现了Cu(Ⅱ ) ,Fe(Ⅲ )的催化动力学分析法同时测定。研究了最佳反应和测定条件。用于合成样品和人发中铜和铁的测定 。
A simultaneous catalytic effect copper(II) and iron(III) on the oxidation of acid chrome blue K by potassium bromate in dilute sulfuric acid medium was observed. But there was an obvious difference in their reaction rates, and the ratio of the reaction constant changed with time. And their spectral addiitive properties were not satisfactory. The simultaneous determination of copper and iron by catalytic kinetic spectrophotometric method was realized by using a three-layer Levenberg-Marquardt BP neural network to cope with the experimental data. The optimum conditions of reaction and determination were studied. The calculation results of the determination in synthetic samples and human hair were satisfactory.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期730-732,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金 (2 0 1 71 0 0 1 )
安徽省教育厅自然科学科研基金(2 0 0 2kj2 0 0 )资助项目
关键词
铜
铁
痕量分析
同时测定
催化动力学
分光光度法
人工神经网络
copper( II)
iron( III)
catalytic kinetic spectrophotometric method
simultaneous determination
artificial neural network
