催化动力学分光光度法测定尾矿中硒含量  

Catalytic Kinetic Spectrophotometric Determination of Trace Amount of Selenium in Tailings

作　　者：马哈亚.艾斯江 巴哈尔古丽.别克吐尔逊 

机构地区：[1]伊犁师范学院化学与生物科学学院,伊宁835000 [2]伊犁师范学院资源与生态研究所,伊宁835000

出　　处：《理化检验（化学分册）》2013年第8期946-948,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：教育部留学回国人员科研启动基金资助项目(2008890)

摘　　要：在1．0mol·L-1盐酸介质中，90℃水浴加热i0min时，痕量硒（Ⅳ）对过氧化氢氧化甲基红褪色反应有显著的催化作用，提出了催化动力学分光光度法测定痕量硒（IV）的方法。硒（IV）的质量浓度在0．004-0．06mg·L-1范围内符合比耳定律，检出限为（3s／k）为2．23×10 μg·L-1，摩尔吸光率为4．351×10^5L·mol-1·cm-1。方法用于尾矿样品中硒（Ⅳ）量的测定，用标准加入法测得回收率在96．7％～99．4％之间，测定值的相对标准偏差（n=11）在2．4％～2．5％之间。In a 1.0 mol L- 1 HCI medium and heated in a water bath at 90 C for 10 min, the oxidative color- fading reaction of methyl red with He 02 was remarkably catalyzed by the presence of trace amount of Se（ IV）. Based on this fact, a catalytic kinetic speetrophotometric method for determination of trace amount of Se （IV） was proposed. Value of molar absorptivity was found to be 4. 351X 10L tool i . cm 1. Beer＇s law was held in the range of 0. 004 --0. 06 mg L-1 , with detection limit of 2. 23）〈 10 2μg L- 1. In analyzing samples of railings by this method, values of recovery and RSD＇s （n- 11） found were in the ranges of 96. 7G--99.4% and Z. 4%--2. 5% respectively.

关 键 词：催化动力学分光光度法 硒 甲基红 过氧化氢 尾矿 

分 类 号：O657.32[理学—分析化学]