考马斯亮蓝G动力学光度法测定痕量铁的研究  

Determination of Trace Iron by Catalytic Spectrophotometry with Coomassie Brilliant Blue G

作　　者：罗川南[1] 周长利[2] 李慧芝[2] 刘元法[2] 

机构地区：[1]中科院兰州化物所,兰州730000 [2]山东建材学院应用化学系,济南250022

出　　处：《分析科学学报》2002年第3期210-213,共4页Journal of Analytical Science

摘　　要：研究了在稀盐酸介质中 ,α,α-联吡啶存在下 ,铁催化溴酸钾氧化考马斯亮蓝G,使其褪色这一新的指示反应及其动力学条件 ,建立了测定痕量铁的新方法。方法的检出限为 2 .2 6× 1 0 - 10 g/ m L,线性范围 0～ 0 .2 4μg/ 2 5 m L,用于食品及水中痕量铁的测定 。A new method has been proposed for the determination of trace iron. The method is based on the oxidation of coomassie brilliant blue G by KBrO 3 in acid medium in the presence of α,α bipyridine and Fe 3+ . The kinetic conditions have been studied. The detection limit for iorn(Ⅲ) is 2.26 ×10 -10 g/mL. The linear range of the determination is 0~0.24 μg/25 mL for iron. Satisfactory results have been obtained for the determination of trace iron in food and water.

关 键 词：测定 催化反应 光度法 铁 考马斯亮蓝G 水 食品 痕量分析 

分 类 号：O614.811[理学—无机化学] O657.32[理学—化学]