SAF双波长光度法测定痕量锗  

DUAI-WAVELENGTH SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF GERMANIUM WITH SALYCYL FLUORONE

作　　者：陈立富[1] 何巧红[1] 朱有瑜[1] 

机构地区：[1]杭州大学化学系,310028

出　　处：《理化检验（化学分册）》1996年第6期338-339,342,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在0.6～3.5mol·L^(-1)盐酸介质中,在阳离子表面活性剂溴化十六烷基三甲基铵(CTMAB)和过量的水杨基荧光酮(SAF)存在下,Ge(Ⅳ)与SAF形成1:4的配合物。以配合物的最大吸收波长504nm为测定波长,试剂的最大吸收波长466nm为参比波长,采用双波长光度法测得配合物的衣观摩尔吸光系数为2.40×10~5。锗量在0～4μg/25ml范围内符合比耳定律。配合物可稳定15h,将所拟方法用于烟道灰中痕量锗的测定,结果令人满意。In the presence of CTMAB,germanium (Ⅳ) reacts with salycyl fluorone (SAF) to form 1 : 4 complex in HCL medium. The measuring and reference wavelengths of the complex are 504nm (λmax of the complex) and 466nm(λmax of the reagent blank) respectively. The molar absorptivity of dual-wavelength spectrophotometry is 2. 4 × 105L ?mol-1 ?cm-1. Beer' s law is obeyed in the range of 0-4μg/25ml for germanium. The complex is stable for 15h. The method has been applied to the direct determination of germanium in ashes with satisfactory results.

关 键 词：锗 水杨基荧光酮 双波长光度法 CTMAB 痕量分析 

分 类 号：O614.431[理学—无机化学] O657.3[理学—化学]