表面活性剂增敏动力学光度法测定痕量钴(Ⅱ)  

Kinetic Spectrophotometric Determination of Trace Cobalt(Ⅱ) with Sensitization Effect of Surfactant

作　　者：张丹扬[1] 杨亚玲[1] 崔邶周[1] 张尹[1] 

机构地区：[1]昆明理工大学生命科学与技术学院,云南昆明650224

出　　处：《分析科学学报》2010年第4期491-493,共3页Journal of Analytical Science

摘　　要：研究了在十二烷基二甲基氧化胺(OB-2)活化下,Co(Ⅱ)催化过硫酸钠氧化甲基紫的褪色反应,并建立了甲基紫褪色催化动力学光度法测定痕量Co(Ⅱ)的新方法。该法测定波长为580nm,线性范围为0.05～3.00μg/25mL,相关系数r=0.9992。检出限为2.0×10-9g/mL,最大相对标准偏差为1.67%,回收率为98.1%～102.3%。The new catalytic kinetic spectrophotometry based on the fading reaction of methyl violet for determining trace cobalt was proposed with sodium persulfate used as oxidizing agent and dodecyl dimethyl amine oxide （OB-2） as activator. The wavelength for determination was 580 nm.The linear range was 0.05~3.00 μg with a regression equation of y=0.087x（μg/25mL）-0.001,r=0.9992. The detection limit was 2.0×10-9 g/mL. The maximum relative standard deviation was 1.67%. The recovery was 98.1%~102.3%.

关 键 词：催化动力学光度法 表面活性剂 十二烷基二甲基氧化胺 钴 过硫酸钠 

分 类 号：O657.3[理学—分析化学]