催化动力学光度法测定微量硒的研究  

Spectrophotometric Determination of Trace Selenium

作　　者：陈百玲[1] 颜克美[1] 廖全斌[1] 黄应平[1] 周强[1] 宋琳[1] 

机构地区：[1]三峡大学化学与生命科学学院,湖北宜昌443002

出　　处：《广东微量元素科学》2006年第11期48-50,共3页Trace Elements Science

摘　　要：在pH9．56的NaBH4-NaOH缓冲溶液中，Se（Ⅳ）催化亚甲基蓝（Methylene Blue）氧化硫离子褪色，由此建立了测定硒的动力学光度法，并确定了反应的最佳条件。结果表明，测定Se（Ⅳ）的线性范围为0～0．18μg／L，检测下限为22μg/L，方法应用于魔芋飞粉中硒含量的测定，简单快速，结果令人满意。In 9.56 NaBH4-NaOH buffer solution and in the presence of methylene blue （MB）, MB was catalysised by Selenium（ Ⅳ ）to oxidize S^2- fade ultraviolet photometric and to determine the content of Se. A catalytic spectrophotometric method for the determination of selenium has been developed. The optimal detection conditions were found out. The range of linear was 0 - 0.18/μg/L and the detection limit was 22μtg/L. The method has been applied to determine the content of selenium in the flyer powder of konjac. The developed method is rapid and easy to operate.

关 键 词：催化动力学光度法 亚甲基蓝 

分 类 号：O657.32[理学—分析化学]