采用次甲基兰催化动力学光度法测定食品中的痕量硒(Ⅳ)  

Determination of Trace Selenium(Ⅳ) in Foods by Catalytic Kinetic Spectropotometry

作　　者：赖海涛[1] 白月[1] 

机构地区：[1]集美大学生物工程学院

出　　处：《食品与发酵工业》2006年第2期102-105,共4页Food and Fermentation Industries

摘　　要：在 HCl 介质中,硒(Ⅳ)能强烈催化溴酸钾氧化次甲基兰使之褪色,据此建立催化动力学光度法测定痕量硒(Ⅳ)的方法。其测定的线性范围为0～0．02μg/mL,检出限1．25×10^(-10)g/mL,用于牛乳、大蒜、黑木耳等食品中硒(Ⅳ)的测定,结果令人满意。A new catalytic kinetic method for determining trace Selenium（Ⅳ）was described. Selenium（Ⅳ）can catalyze the discolouring oixidizing reaction of methylene blue by potassium bromate with hydrochloric acid medium. The linear range of determination was 0 - 0.02 μg/mL, The detection limit for Se（Ⅳ）was 1.25 × 10^-10 g/mL. Satisfactory results have been obtained from determination of trace Se（Ⅳ）in milk, garlic and Jew＇ s- ear foodstuff.

关 键 词：催化动力学 次甲基兰 痕量硒测定 

分 类 号：TS207.5[轻工技术与工程—食品科学]