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提出了等色染料离子对浮选光度法。向罗丹明６Ｇ（Ｒ６Ｇ）和ＡｕＢｒ－４的甲苯萃取物Ｒ６ＧＡｕＢｒ４中，加入ｐＨ＝５５的（ＮＨ４Ａｃ－ＨＡｃ）缓冲溶液，使Ｒ６Ｇ离子进入水相，并向其中加入与Ｒ６Ｇ颜色相同的四溴荧光素（ＴＢＦ），形成等色染料离子对Ｒ６Ｇ＋·ＴＢＦ－被甲苯浮选。将浮选物溶于丙酮，于５３０ｎｍ处光度测定。由于２个染料分子（Ａｕ∶Ｒ６Ｇ∶ＴＢＦ＝１∶１∶１）同时吸光，方法具有很高的灵敏度，ε＝２０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１；金含量在０～０３６ｍｇ／Ｌ服从比耳定律，相对标准偏差为２９％，方法应用于粗铜中金的测定，结果满意。
Proposed by the same color dye ion flotation spectrophotometry. To Rhodamine 6G (R6G) and AuBr-4 toluene extract R6GAuBr4, pH = 5 5 (NH4Ac-HAc) buffer solution was added, so that R6G ions into the aqueous phase, and to which was added the same color as R6G Bromofluorescein (TBF), the formation of isochromatic dye ions on the R6G + · TBF-toluene flotation. The flotation was dissolved in acetone and photometrically measured at 530 nm. Because of the simultaneous absorption of two dye molecules (Au: R6G: TBF = 1: 1: 1), the method has very high sensitivity, ε = 2.0 × 105L · mol-1 · cm- 36mg / L obey Beer’s law, the relative standard deviation of 2 9%, the method used in the determination of blister copper gold, the results are satisfactory.