摘要
在碱性条件下,ClO2氧化罗丹明染料发生荧光猝灭可选择性地测定ClO2的含量,而ClO2-不干扰测定;在酸性条件下可测量ClO2与ClO2-共同产生的荧光猝灭强度,利用差减法可求出ClO2-的含量.对于罗丹明S,罗丹明G,罗丹明B及丁基罗丹明B四体系,ClO2浓度分别在0·00840—0·53μg·ml-1,0·0930—3·15μg·ml-1,0·215—2·610μg·ml-1及0·0825—1·096μg·ml-1范围内,与四体系的荧光猝灭强度呈线性关系;亚氯酸根浓度分别在0·00950—0·711μg·ml-1,0·0940—2·36μg·ml-1,0·473—4·73μg·ml-1及0·473—2·36μg·ml-1范围内,与四体系的荧光猝灭强度呈线性关系.另外,选择罗丹明S荧光猝灭法分别测定了饮用水中ClO及ClO-,获得了满意的结果.
The fluorescence of rhodamine dyes was quenched by ClO2 in alkaline solution, it can be selectively determined by the fluorescence quenching procedure, and ClO2^- does not interferes with the determination. The total fluorescence quenching intensity of ClO2 and ClO2^- in acidic medium can be recorded, and the content of ClO2^- was obtained. For the RhS, RhG, RhB and butyl-RhB systems, the linear range is 0. 00840-0. 531μg·ml^-1, 0. 0930--3. 151μg·ml^-1, 0. 215-2. 6101μg·ml^-1 and 0. 0825--1. 096 μg·ml^-1 ClO2, respectively. The linear range of chlorite is 0. 00950-0. 7111μg·ml^-1 , 0. 0940--2. 36μg·ml^-1, 0. 473--4. 731μg·ml^-1 and 0. 473-2. 361μg·ml^-1 , respectively. In the four systems, the RhS system has good stability and high sensitivity and was chosen to determine ClO2and ClO2^- in drinking water, with satisfactory results.
出处
《环境化学》
CAS
CSCD
北大核心
2007年第4期531-534,共4页
Environmental Chemistry
关键词
二氧化氯
亚氯酸根
罗丹明染料
荧光猝灭
chlorine dioxide, chlorite, Rhodamine dyes, fluorescence quenching.
