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本文研究了四溴荧光素（ＴＢＦ）、罗丹明６Ｇ（Ｒ６Ｇ）等色染料离子对浮选光度法测定锗、铂和铁的方法。首先将被测金属离子形成的［ＭｅＬｎ（Ｒ６Ｇ）ｍ］（Ｌ：配位体，ｍ、ｎ为整数）有机溶剂浮选物，用碱解析并反萃于水相。而后加入与罗丹明６Ｇ等色的四溴荧光素溶液继续浮选，将形成的等色染料离子对Ｒ６ＧＴＢＦ浮选物溶解于丙酮。于５３０ｎｍ处测定吸光度值。由于２ｍ个染料同时吸收同一波长的光，而提高了方法灵敏度。测定Ｇｅ、Ｐｔ和Ｆｅ的摩尔吸光系数均在１０５Ｌｍｏｌ－１ｃｍ－１以上
In this paper, the methods of flotation spectrophotometric determination of germanium, platinum and iron with colored dye ions such as tetrabromofluorescein (TBF) and rhodamine 6G (R6G) were studied. First, the [MeLn (R6G) m] (L: ligand, m, n is an integer) organic solvent flotation formed from the metal ion to be measured is resolved by alkali and back-extracted into the aqueous phase. Then add the same color of rhodamine 6G tetrabromofluorescein solution to continue flotation, the formation of isochromatic dye ions on R6GTBF flotation dissolved in acetone. Absorbance was measured at 530 nm. Since 2m dyes absorb light of the same wavelength at the same time, the method sensitivity is improved. The molar extinction coefficients of Ge, Pt and Fe were all above 105Lmol-1cm-1