期刊论文

中文

应用化工

1671-3206

2014

43

6

1143-1146

10.16581/j.cnki.issn1671-3206.2014.06.003

本校为第一机构

在醋酸-醋酸钠缓冲溶液中,铬(VI)催化溴酸钾氧化罗丹明6G(Rh6G)使其荧光强度减弱,据此建立一种催化动力学光度法测定环境水中铬(VI)的新方法。优化了反应和测定条件。该反应体系中Rh6G的最大发射波长λ_(max) = 555 nm。荧光值改变值与铬(VI)的浓度在0.01~0.14 μg/mL范围内呈良好线性关系,检出限为3.46 ng/mL,相对标准偏差

In HAc-NaAc buffer medium,Rh6G was oxidized by potassium bromate with chromium(VI) as an catalyst,which resulting in fluorescence intensity decreased. A new catalytic kinetics spectrofluorim-etry for determination of trace chromium was established and the optimum conditions were studied. Maxi-mum emission peak of the reaction system located at 555 nm,the decreased fluorescence intensity was proportional to the concentration of Cr(VI)in the range of 0. 01 ~ 0. 14 μg / mL. The detection limit was 3. 46 ng / mL,RSD was ...