维多利亚艳蓝分光光度法测定镓  

Spectrophotometric Determination of Gallium with Victoria Pure Blue BO as Color Reagent

作　　者：陈肖云[1] 施文健[1] 陈树薇[1] 宋伟[1] 俞芸[1] 钟晓永[1] 

机构地区：[1]上海理工大学城建学院,上海200093

出　　处：《理化检验（化学分册）》2009年第5期580-582,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：上海市世博重大科技专项资助项目(06dz05809);上海理工大学大学生创新基金资助项目(104711)

摘　　要：以聚乙二醇辛基苯基醚为稳定剂，在pH2．4的磷酸-磷酸二氢钠缓冲溶液中，维多利亚艳蓝BO与GaI4^-反应生成缔合物，缔合物的最大吸收波长560nm，表观摩尔吸光率5．53×10^5L·mol^-1·cm^-1镓（Ⅲ）的质量浓度在1．3×10^-3-7．0×10^-2mg·L^-1范围内遵守比耳定律。应用此方法测定了煤矸石和煤灰中痕量镓，所得结果与国家标准方法测得的结果相符。其相对标准偏差（n=8）均小于3％。测得方法的回收率97%-101％。An association complex between Ga （Ⅲ） （in form of GaI4^-） and victoria pure blue BO in a phosphate buffer medium of pH 2. 4 and in the presence of OP, was formed, having its absorption maximum at 560 nm. The apparent molar absorptivity （ε560） found was 5.53×10^5L· mol^-1· cm^-1. Beer＇s law was held in the range of 1.3 ×10^-3 - 7. 0 × 10^-2 mg · L^-1 of gallium（Ⅲ）. The proposed method was used in determination of gallium in samples of gangue and coal ash, results obtained were in consistency with those obtained by the standard method （GB/T 8208-1987）, with values of RSD＇s （n=8） less than 3%. Results of recovery test found were in the range from 97%to 101%.

关 键 词：分光光度法 镓 维多利亚艳蓝BO 煤矸石 粉煤灰 

分 类 号：O657.3[理学—分析化学]