吖啶橙荧光猝灭法测定饮用水中痕量溴酸根
Fluorospectrophotometric Determination of Trace Amount of Bromate in Drinking Water by the Fluorescence Quenching of Acridine Orange
摘 要
基于在盐酸介质中,一定量的溴化钾存在下,当溴酸根氧化吖啶橙时使其荧光猝灭,提出了荧光猝灭法测定饮用水中溴酸根的方法。在激发波长493 nm,发射波长528 nm条件下,体系的荧光强度降低值ΔF与溴酸根的质量浓度在10.0~560.0 μg·L-1范围内呈线性关系,方法检出限(3S/N)为3.03 μg·L-1。方法用于纯净水和桶装水中溴酸根的测定,回收率在94.0%~107%之间。
吖啶橙
荧光猝灭法
Bromate
Acridine orange
Fluorescence quenching
Abstract
Based on the fluorescence quenching effect produced by oxidation of acridine orange with BrO3- in the presence of KBr in a HCl medium, a method for the determination of trace amount of BrO3- in drinking water was proposed. Linear relationship between magnitude of decrease in fluorescence intensity (ΔF) and mass concentration of BrO3- was kept in the range of 10.0-560.0 μg·L-1, when measured at (λex) 493 nm and (λem) 528 nm. Value of detection limit (3S/N) found was 3.03 μg·L-1. The proposed method was applied to the determination of bromate in purified water and barreled water, giving values of recovery by standard addition method in the range of 94.0%-107%.
中图分类号 O657.32
所属栏目 工作简报
基金项目 湖南省科技厅项目(2010FJ3076)资助
收稿日期 2011/6/17
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备注杨胜园(1975-),女,湖南吉首人,副教授,硕士,主要从事有毒有害物质检测方法研究。
引用该论文: YANG Sheng-yuan,YANG Hui-xian,YU Jun-hui,CHEN Yun-sheng,ZENG Qiang. Fluorospectrophotometric Determination of Trace Amount of Bromate in Drinking Water by the Fluorescence Quenching of Acridine Orange[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2012, 48(8): 917～919
杨胜园,杨慧仙,于军晖,陈云生,曾强. 吖啶橙荧光猝灭法测定饮用水中痕量溴酸根[J]. 理化检验－化学分册, 2012, 48(8): 917～919
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参考文献
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【3】崔丽英,叶新强,赵振平.离子色谱法测定矿泉水中溴酸根［J］.理化检验-化学分册, 2004,40(4):215-216.
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【7】王海霞,盛丽,韩小茜.罗丹明荧光法测定微量溴酸根离子［J］.光谱实验室, 2007,24(4):587-589.
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