在β-环糊精存在下催化动力学光度法测定铬(VI)  

Determination of Trace Chromium(Ⅵ) by Catalytic Photometry in the Presence of β-Cyclodextrin

作　　者：赵立杰[1] 靳凤丹[2] 汪建新[1] 白丽明[1] 

机构地区：[1]齐齐哈尔大学化学与化工学院,黑龙江齐齐哈尔161006 [2]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《信阳师范学院学报（自然科学版）》2012年第1期103-105,共3页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家教育部留学归国人员科研启动基金项目(2009-36-1341)

摘　　要：在β-环糊精存在下,根据铬催化溴酸钾氧化罗丹明B的褪色反应,建立了测定痕量铬的新方法.实验结果表明:方法的最大吸收波长为575 nm,铬量在0.007～0.27 mg/L范围内符合比尔定律,表观摩尔吸光系数为1.95×105L.mol-1.cm-1.用于钢样中铬含量的测定,结果与认定值吻合.A new catalytic spectrophotometric method for the determination of trace chromium（Ⅵ） was developed based on the oxidation of rhodamine B with potassium bromate catalyzed by chromium（Ⅵ） in the present of β-cyclodextrin.The result showed that the maximum absorbance wave length is at 575 nm.The beer’s law is obeyed in the range of 0.007-0.27 mg/L with apparent molar absorption of 1.95 × 105 L·mol^（-1）·cm^（-1）.The proposed method was applied to determination of trace chromium（Ⅵ） in steel samples and the results are agreement with certified values of samples.

关 键 词：铬 催化动力学光度法 Β-环糊精 

分 类 号：O657.3[理学—分析化学]