锶与二溴对甲偶氮羧显色反应的研究及其分析应用  

Study on the Color Reaction of Strontium with Dibromomethyl Carboxyazo and Its Analytical Application

作　　者：李景捷[1] 刘宇红[1] 谢坤 

机构地区：[1]北京科技大学冶金学院,北京100083

出　　处：《冶金分析》1999年第5期21-28,共8页Metallurgical Analysis

摘　　要：研究了二溴对甲偶氮羧与锶（Ⅱ）的显色反应，考察了反应条件和分析特性。在Ｈ_３ＢＯ_３-Ｎａ_２Ｂ_４Ｏ_７缓冲溶液中，试剂与 Ｓｒ^(２＋)形成２：１的络合物，在 ６２０ｎｍ处的摩尔吸光系数 ε＝１．８９×１０~４。 Ｓｒ^(２＋)量在 ０．２５—１．２５μｇ／ｍＬ范围内，服从比尔定律。设计了测定铁氧体样品中锶的新方法，结果满意。The color reaction of dibromomethyl carboxyazo with strontium (II) was studied. The reaction conditions and analytical property were investigated. In H_3BO_3-Na_2B_4O_7 buffer solution, the reagent with Sr^(2+) formed a complex (2:1) having an apparent molar absorptivity of 1.89×10~4 L· mol^(-1) cm^(-1) at 620nm. Beer's law is obeyed over the range of 0.25-1.25μg/mL for Sr^(2+). This method has been applied to determination of strontium in ferrite with satisfactory results.

关 键 词：锶 二溴对甲偶氮羟 铁氧体 分光光度法 显色反应 

分 类 号：O614.232[理学—无机化学]