非离子表面活性剂存在下流动注射催化光度法测定痕量硒

On-line Kinetic Spectrophotometric Method to Determine Micro Amounts of Selenium in the Presence of Nonionic Surfactant-Ⅰ

本文利用非离子表面活性剂存在下的胶束催化作用,改进了硒催化 S^(2-)还原亚甲基蓝的退色反应,提出了在线动力学分光光度测定痕量硒的方法,方法的检出限为8.0ng/g,相对标准偏差小于1.2％,并已将该法用于人发中微量硒的测定,获得满意的结果。

In the presence of non-ionic surfactant,with the catalysis of selenium on the decolora tion reaction between S^(2-) and methylene blue,on-line kinetic spectrophotometric mothod for the determination of micro amounts of solenium was proposed.The detectability of the method was 8.0ng/g.Relative standard dev ation is less than 1.2%.It has been used to determine micro amounts of selenium in human hair with satisfactory results.