钼－3，4－二甲氧基苯基荧光酮－吐温－80的显色反应及其应用

Color Reaction of Mol ybdenum with 3,4-Dimethoxyphenyl Fluorone and Tween-80

在０．１８～０．３２ｍｏｌ／ＬＨＣｌ介质中，Ｍｏ（Ⅵ）与３，４－二甲氧基苯基荧光酮（ＤＭＯＰＦ）和Ｔｗｅｅｎ－８０形成三元胶束配合物，最大吸收峰在５２６ｎｍ处，摩尔吸光系数为１．１６×１０￣５Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，Ｍｏ（Ⅵ）含量在０～０．５３μｇ／ｍｌ范围内符合比耳定律。所建立的方法用于矿样中Ｍｏ的测定，结果较为满意。

n hydrochloride acid medium(0.18～0.32mol/L),molybdenum forms a ternary complex with 3,4-dimethoxyphenyl fluorone and Tween-80.The maximum absorption is at 526nm and the apparent molar absorption coefficient is 1. 16 × 10￣5L· mol￣-1· cm￣-1.The constitution of the complex is Mo:3,4-dimethoxyphenyl Fluoron=1: 1 in the presence of Tween-80. Beer’s law is obeyed in the range 0～0.53μg/ml Mo(Ⅵ).The method has been used for the determination of molybdenum in ores with satisfactory results.