摘要
在pH10.5NH4Cl-NH3缓冲溶液中,荧光素在490nm处有一最大吸收峰。当加入二氧化氯后,其吸收峰降低,在490nm波长处的吸光度降低值与二氧化氯浓度在0.10～4.0μgml范围成良好线性关系,检出限(3σ)为0.04μgmlClO2。据此建立了一个灵敏简便、快速准确,选择性测定痕量二氧化氯含量的分光光度法,用于水样分析,结果满意。
In pH 10.5 NH4Cl - NH3 buffer solutions, there is a max absorption peak at 490nm for fluorescein. When chlorine dioxide is added, the peak decreased sharply. The results show that the decreased absorbance value at 490nm is linear to the chlorine dioxide concentration in the range of 0.10 - 4.0μg/ml. The detection limit （3σ） is 0.04μg/ml ClO2. A new spectrophotometric method has been proposed for the determination of ClO2 in water samples, with advantages including high sensitivity, selectivity, simplicity, rapidity and accuracy.
出处
《中国环境监测》
CAS
CSCD
北大核心
2006年第1期26-28,共3页
Environmental Monitoring in China
基金
广西自然科学基金项目(0575042)
关键词
二氧化氯
荧光素
分光光度法
Chlorine dioxide
Fluorescein
Speetrophotometry
