Fe(Ⅲ)-phen-溴甲酚蓝-乙醇体系光度法测定铁  

Photometric Determination of Fe(Ⅲ) by Adopting Fe(Ⅲ) O Phen Bromocresol Alcohol System

作　　者：方文焕[1] 吴绍祖[1] 

机构地区：[1]华侨大学化工学院

出　　处：《华侨大学学报（自然科学版）》1999年第1期35-38,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金

摘　　要：提出联用配合物形成－离心－光度测量技术测定高铁的新方法．在Ｆｅ（Ⅲ）－ｐｈｅｎ（邻菲啉）－溴甲酚蓝－乙醇的有色型体溶液中，于λｍａｘ＝４２５ｎｍ处测得表现摩尔吸光系数ε为１．８×１０５Ｌ·（ｍｏｌ·ｃｍ）－１．Ｆｅ（Ⅲ）的浓度在１．０７４×１０－５ｍｏｌ·Ｌ－１的范围内服从比尔定律，其灵敏度比Ｆｅ（Ⅲ）－ｐｈｅｎ二元有色型体液相光度法测定提高了１８倍．该方法应用于离体血清和矿泉水样品中的高铁直接测定，结果满意．For determining Fe(Ⅲ), the authors present a new method which jointly adopts the techniques of coordination compound and centrifugation and photometry. In the colorful and configurative solution of Fe(Ⅲ) ortho phenanthroline bromocresol blue alcohol, a molar absorptivity of 1 8×10 5 L·(mol·cm) -1 is shown at λ max 425 nm and Beers law is obeyed by Fe(Ⅲ) in the concentration range of 0～1 074×10 -5 mol·L -1 and the sensitivity is 18 times higher than that of Fe(Ⅲ) O phenanthroline solution. The method has been applied to the direct determination of Fe(Ⅲ) in the samples of blood serum and mineral water, with satisfactory results.

关 键 词：邻菲LUO啉 溴甲酚蓝 乙醇 铁 光度法 测定 

分 类 号：O614.811[理学—无机化学] O657.3[理学—化学]