四溴汞(Ⅱ)酸钾-异辛基苯二聚乙二醇醚二甲基苄基氯化铵的共振散射光谱及其分析应用  

Resonance scattering spectroscopic study on ion association system of potassium mercuric bromide-benzethoniumchloride and its analytical application

作　　者：黄德发[1] 

机构地区：[1]湖南科技大学化学系,湘潭411201

出　　处：《分析试验室》2005年第10期48-51,共4页Chinese Journal of Analysis Laboratory

摘　　要：在pH 2～8的溶液中,四溴汞(Ⅱ)酸钾和异辛基苯二聚乙二醇醚二甲基苄基氯化铵(BTC)反应生成离子缔合物,在390 nm处有一共振散射峰,峰强度随汞(Ⅱ)质量浓度的增加而增大,据此建立了测定痕量汞的新方法.在实验条件下,此法测定汞(Ⅱ)的线性范围是14～240 μg/L,检出限为5 μg/L,已用于合成水样和环境水样中汞(Ⅱ)的测定.In pH 2 - 8 buffer solution, potassium mercuric bromide reacts with benzethoniumchloride to form ion association complexes by static interaction. There is a resonance scattering peak at 390 nm. With increasing mercury（Ⅱ ） concentration, the peak height increases greatly. Based on this phenomenon mercury（Ⅱ） can be determined. The linear range of mercury （Ⅱ） is 14-240 μg/L, and the limit of detection （3σ） is 5.0μg/L. Satisfactory results have been obtained for the determination of synthesized water samples and environmental water samples.

关 键 词：四溴汞(Ⅱ)酸钾 异辛基苯二聚乙二醇醚二甲基苄基氯化铵 离子缔合物 共振散射 

分 类 号：O657.32[理学—分析化学]