摘要
研究了在硫酸介质中,以非离子表面活性剂吐温-80为增敏剂,Fe(III)催化过氧化氢氧化罗丹明B的褪色反应,以此建立了催化动力学光度法测定痕量铁。结果表明,Fe(III)的质量浓度在0~16ug/L范围内服从比尔定律,摩尔吸光系数为1.06×10^5L·mol^-1·cm-1。该法用于茶叶中痕量铁的分析,结果满意。
Based on the catalytic effect of iron (III) on the oxidation of rhodamine B by hydrogen peroxid, in sulfuric acid medium with sensitization effect of nonionic surfactant tween-80, a catalytic kinetic spectrophotometric method for determination of trace iron was established. The result shows that the molar absorption coefficient is 1.06×10^5 L.mol^-1.cm-1. when the iron concentration is in the range of 0-16.g/L, this is accord with lambert beer's law. Favorable results is achieved by this method in tea.
出处
《价值工程》
2012年第2期274-275,共2页
Value Engineering
基金
浙江省新苗人才计划基金
编号:2010R429024
关键词
催化动力学光度法
铁
过氧化氢
表面活性剂
罗丹明
catalytic kinetic spectrophotometry
iron
hydrogen peroxid
surfactant, rhodamine B