期刊论文

Determination of Trace Cadmium in Water with Eosine Y-Neutral Red by Energy Transfer Fluorescence Quenching Method

中文

南华大学学报(自然科学版)

1673-0062

2014

1

91-96

10.19431/j.cnki.1673-0062.2014.01.020

国家自然科学基金资助项目（31200140）；

本校为第一机构

在pH 7.9的BR缓冲液中,曙红Y-中性红和镉离子相互作用,在535 nm处荧光强度随着镉浓度的增加,体系的荧光逐渐降低,其荧光强度降低值和镉离子含量在一定范围内有相关关系.据此建立了一种测定痕量镉的曙红Y-中性红体系能量转移荧光猝灭新方法,并优化了实验条件.在优化的实验条件下,体系在535 nm处的荧光强度降低值与镉的摩尔浓度在1.6＆#215;10-8~3.2＆#215;10-6 mol/L范围内线性关系良好,其线性回归方程为：？F=936.60-2425.2c（＆#215;10-6mol/L）,相关系数r=0.998,检出限为4.7＆#215;10-9 mol/L,相对标准偏差是0.45%,加标回收率是90.75%.本方法操作简便、灵敏、选择性好,用于实际样品中镉的测定...

In the Britton-Robinson buffer solution of pH7. 9,the system intensity was obvi-ously decreased due to the interaction between the Eosine Y-Neutral red complex and cad-mium ion,and the decreased fluorescence intensity was proportional to the concentration of cadmium ion. Based on this phenomenon,a novel energy transfer fluorescence quenching method for the determination of trace cadmium with EosineY-Neutral red was proposed.And this paper optimized experiment conditions. Under the optimal experimental conditions,there was a linear relationship ...