荧光素增敏次溴酸根氧化联氨弱化学发光结合流动注射法测定水中微量联氨  

Flow-injection chemiluminescence determination of hydrazine in water samples based on hypobromite oxidation sensitized by fluorescein

作　　者：王朝阳[1] 郑行望[1] 李桂新[1] 

机构地区：[1]陕西师范大学化学与材料科学学院,历史文化遗产保护教育部工程研究中心,西安710062

出　　处：《分析试验室》2008年第1期107-110,共4页Chinese Journal of Analysis Laboratory

摘　　要：研究发现，在碱性条件下，BrO^-／Br^-电对中BrO^-氧化联氨的弱化学发光信号可以基于能量转移化学发光原理被荧光素所增敏。据此和流动注射技术相结合，建立了测定联氨的化学发光新方法。在最佳实验条件下，该方法的线性范围为3．0×10^-5～4．0×10^-8g／mL，检出限（3d）为1．2×10^-8g／mL；对8．0×10^-7g／mL联氨进行11次平行测定，其相对标准偏差为1．3％。方法已用于水样中联氨的回收实验分析。A rapid and sensitive flow-injection chemiluminescence method for the detemaination of hydrazine is described. The method is based on the strong chemiluminescence signal generated from the oxidation of hydmzine by hypobromite in alkaline medium and in the presence of both bromide and fluorescein. Under the optimum experimental conditions, the linear range of detemaination is 3.0 × 10^-5 - 4.0 × 10^-8 g/mL for hydrazine with the relative standard deviation of 1.3% （p = 8.0 × 10^-7 g/mL, n = 11） and the detection limit is 1.2× 10^-8 g/mL （3σ）. The recom- mended method has been successfully used for analysis of lake water samples with satisfactory results.

关 键 词：化学发光 联氨 次溴酸根 荧光素 

分 类 号：O657.3[理学—分析化学]