十六烷基三甲基溴化铵-氯金酸-肼显色体系测定废水中微量肼  

Determination of micro hydrazine in waste water by hexadecyl trimethyl ammonium bromide-chloroauric acid-hydrazine color reaction system

作　　者：刘庆业[1] 梁爱惠[2] 蒋治良[1] 

机构地区：[1]广西师范大学环境与资源学院 广西环境工程与保护评价重点实验室,广西桂林541004 [2]桂林工学院材料与化学工程系,广西桂林541004

出　　处：《冶金分析》2009年第4期74-76,共3页Metallurgical Analysis

基　　金：广西自然科学基金(No.0833260);广西环境工程与保护评价重点实验室研究资金资助项目(桂科能0701k008,0701z022)

摘　　要：在0.015mol/LNaOH介质中,氯金酸根离子(AuCl4-)与阳离子表面活性剂十六烷基三甲基溴化铵(CTMAB)反应生成水溶性的CTMAB-AuCl4缔合物,在400nm处产生一个很弱的吸收峰,当有肼存在时,反应生成橙红色的金纳米粒子,在520nm处出现一个表面等离子体共振吸收峰,从而可实现废水中微量肼的分光光度测定。在选定条件下,肼浓度在0.025～1.0μg/mL范围内遵守比尔定律,其表观摩尔吸光系数为5.9×104L·mol-1·cm-1,一些常见离子不干扰测定。方法用于管网水和废水中微量肼的测定,回收率在94%～101%之间。In 0. 015 mol/L NaOH medium, AuCl^-4 reacted with hexadecyl trimethyl ammonium bromide （CTMAB）, forming water soluble CTMAB-AuCl4 complex that exhibited a weak absorption peak at 400 nm. In the presence of hydrazine, the reaction produced orange-red nanogold particle and exhibited a surface plasma resonance absorption peak at 520 nm. Under selected conditions, Beer＇s law was obeyed for hydrazine in the concentration range of 0. 025-1.0 μg/mL with apparent molar absorptivity of 5.9 × 10^4 L· mol^-1 · cm^-1. Experiments showed common ions did not interfere with the determination. This method was applied to the determination of hydrazine in tap water and waste water samples with recovery of 94%-101 %.

关 键 词：肼 分光光度法 

分 类 号：X832[环境科学与工程—环境工程]