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在表面活性剂存在下.应用取代苯基荧光酮光度法测定锗已有报道。显色反应具有较高的测定灵敏度是它的一大特点。反应在高酸度下进行时,选择性较好,低价元素基本不干扰.高价元素之间的干扰可采用加适当掩蔽剂或萃取分离来消除。文献用4,5-二溴苯基荧光酮、CTMAB光度测定锗,灵敏度高,但选择性欠佳。本文用CTMAB-Tween 80混合表面活性剂,显色反应的表观摩尔吸光率为1.55×10~5且选择性较上述体系也有提高,是迄今为止测定锗的吸光光度法中干扰最少的体系之一。将此法用于三种不同种类的矿样锗量的直接测定,结果表明,该法快速准确,具较好的应用前景。
In the presence of surfactants, the use of substituted phenylfluorone spectrophotometric determination of germanium has been reported. Color reaction with high sensitivity is one of its major features. When the reaction is carried out under high acidity, the selectivity is good, and the low-priced elements do not substantially interfere with each other. Interference between high-priced elements can be eliminated by adding appropriate masking agents or extraction and separation. Literature with 4,5-dibromophenylfluorone, CTMAB photometric determination of germanium, high sensitivity, but poor selectivity. In this paper, CTMAB-Tween 80 mixed surfactant, the apparent molar absorptivity of the color reaction was 1.55 × 10 ~ 5 and selectivity than the above system also increased, so far the determination of germanium absorption spectrophotometry least interference system one. This method was applied to the direct determination of the amount of germanium in three different kinds of samples. The results show that the method is rapid and accurate and has a good application prospect.