盐酸耐尔蓝催化动力学光度法测定痕量铁的研究  

Determination of trace iron by catalytic spectrophotometry with nile blue

作　　者：罗川南[1] 周长利[1] 魏琴[1] 严永红[1] 

机构地区：[1]山东建材学院应用化学系,济南250022

出　　处：《卫生研究》2002年第4期285-287,共3页Journal of Hygiene Research

摘　　要：研究了在稀盐酸介质中 ,氨三乙酸存在下 ,铁 (Ⅲ )催化溴酸钾氧化盐酸耐尔蓝 ,使其褪色这一新的指示反应及其动力学条件 ,建立了灵敏地测定痕量铁的新方法。该方法检出限为 4 73× 10 - 1 0 g ml,线性范围0～ 16 μg L 。A new method is developed for the determination of trace iron, which is used to catalyze the discoloring reaction of KBrO3 oxidizing nile blue in acid medium in the presence of NTA. The kinetics is studied. The method has high sensitivity and the range of determination is 0～0.4μg/25mL for iron. The detection limit of the method is 4.73×10 -10g/mL. Satisfactory results are obtained for the determination of trace iron in food and water.

关 键 词：催化反应 光度法 痕量铁 盐酸耐尔蓝 食品 

分 类 号：R155.5[医药卫生—营养与食品卫生学]