等色染料离子对浮选光度法研究-四溴荧光素·罗丹明6G体系  

Floatation Spectrophotometric Determination of Metals with Isochromatic Dye Ion pairs Tetarbromofluorescein Rhodamine 6G System

作　　者：刘保生[1] 陈彩萍[1] 左本成[1] 

机构地区：[1]河北大学理化分析中心

出　　处：《光谱学与光谱分析》1999年第3期487-489,共3页Spectroscopy and Spectral Analysis

摘　　要：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。The floatation spectrophotometric determination of germanium,platinum and ferrum with isochromatic dye ion pairs formed by tetarbromofluorescein(TBF) and rhodamine 6G(R6G) is described.The association complexes of these metallic ions with rhodamine 6G floated with organic solvent were first allowed to react on basicity,and then on tetarbromofluorescein which is of the same color as rhodamine 6G.The isochromatic dye ion pairs of R6G·TBF were floated with toluene.The floatation R6G·TBF in acetone was dissolved and the absorbance of the solution at 530 nm was measured.The sensitivity is raised because of the 2 m dyes.The molar absorptivities for Ge,Pt and Fe are greater than 10 5 L mol -1 cm -1 .

关 键 词：四溴荧光素 罗丹明6G 浮选光度法 测定 猪 铂 铁 

分 类 号：O614.811[理学—无机化学] O614.826[理学—化学]