褪色光度法测定痕量铬(Ⅲ)  

Decoloring spectrophotometric determination of trace amount of chromium(Ⅲ)

作　　者：孙宏伟[1] 王玉金[2] 陈娟平[2] 柳玉英[2] 

机构地区：[1]山东淄博实验中学,山东淄博255020 [2]山东理工大学化学工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2009年第6期109-110,共2页Journal of Shandong University of Technology:Natural Science Edition

基　　金：山东省自然科学基金资助项目(Y2008B26)

摘　　要：在稀盐酸介质中,痕量铬（Ⅲ）能够催化溴酸钾氧化靛蓝胭脂红的反应,由此建立了催化动力学光度法测定痕量铬（Ⅲ）的方法.通过实验确定了反应的最佳条件.方法线性范围为0.04～0.8mg/L,检出限为4.32×10^-9g/mL.将该方法用于废水、污水中痕量铬（Ⅲ）的测定,获得了较满意的结果.A new decoloring spectrophotometic method based on the catalytic effect of chromium（Ⅲ） on the reaction between KBrO3 and indigo carmine in the medium of HCl has been developed for the determination of trace amount of Chromium（Ⅲ）.The optimum conditions were studied in details.The linear range of determination is 0.04～0.8mg/L and the detection limit is 4.32×10^-9g/mL Chromium（Ⅲ）.The method was applied to the determination of trace chromium（Ⅲ） in waste water and polluted water with satisfactory results.

关 键 词：铬(Ⅲ)的测定 靛蓝胭脂红 褪色光度法 

分 类 号：O614.611[理学—无机化学]