新试剂3,5-二溴-4-偶氮间苯二酚苯基荧光酮与锗配合物的分光光度法研究

SPECTROPHOTOMETRIC DETERMINATION OF GERMANIUM WITH 2,3,7 TRIHYDROXY 9 [3,5 DIBROMO 4 (2,4 DIHYDROXY) PHENYLAZO] PHENYLFLUORONE

本文研究了在表面活性剂Ｔｗｅｅｎ６０存在下，新试剂３，５－二溴－４－偶氮间苯二酚苯基荧光酮与锗（Ⅳ）的显色反应和光度性质。在０．５～１．５ｍｏｌ／ＬＨＣｌ介质中，锗与试剂形成１２的红色三元胶束配合物，最大吸收波长为５３２ｎｍ，表观摩尔吸光系数ε为１．６８×１０５Ｌｍｏｌ－１ｃｍ－１，锗浓度在０～５μｇ／２５ｍｌ范围内符合比尔定律。拟定方法用于煤样中微量锗的分析，结果满意。

The conditions of colour reaction of Germanium(Ⅳ) with a new organic reagent 2,3,7 trihydroxy 9 [3,5 dibromo 4 (2,4 dihydroxy) phenylazo] phenylfluorone (DBARPF) in the presence of Tween 60 were studied. It was found that Ge(Ⅳ) reacts with DBARPF and Tween 60 in 0.5～1.5mol/L HCl medium to form a 1∶2 red ternary micelle complex with maximum absorption at 532nm. The molar absorptivity is 1.68×10 5,Beer′s law being adhered within the range of 0～5μg/25ml.The method has been applied to determine of Ge(Ⅳ) with satisfactory results.