催化褪色光度法测定痕量铁的研究  

Study on the Catalytic Decolourization Spectrophotometric Determination of Trace Iron

作　　者：张玉洲[1,2] 孙登明[1,2] 杨超[1,2] 阮大文[1,2] 

机构地区：[1]淮北煤炭师范学院化学系 [2]浙江工业大学化工系

出　　处：《分析试验室》1998年第4期76-78,共3页Chinese Journal of Analysis Laboratory

基　　金：煤炭青年科学基金;安徽省教委自然科学基金

摘　　要：研究了在ｐＨ４．５的弱酸性介质中，利用邻菲口罗啉活化过氧化氢氧化紫脲酸铵褪色的指示反应。建立了催化动力学光度法测定痕量铁的新方法。方法的检出限为６．５×１０－７ｇ／Ｌ，线性范围为０～１．０μｇ／２５ｍＬ，用于水、粮食中痕量铁的测定，结果满意。n this paper,a new catalytic-kinetic spectrophotometric method for the determination of trace iron has been studied.The method is based on the oxidation of murexide by hydrogen peroxide with iron (Ⅲ) as catalyst and 1,10 phen as activator in a weakly acidic medium at pH4.5.The detection limit is 6.5×10 -7 g/L.The linear range of iron is 0～1.0μg/25mL.The method has been applied to the determination of iron in water and grains with satisfactory results.

关 键 词：催化光度法 铁 紫脲酸铵 测定 

分 类 号：O614.811[理学—无机化学]