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近年来,应用阳离子表面活性剂实现其胶束增溶作用,来提高络合物的稳定性和测定的灵敏度,已发表了不少文章。本文就国产溴化十六烷基吡啶(CPB)同铬天青S(CAS)测定铝的条件进行了试验,取得了较满意的结果。在测定金属铌钽中的铝时,事先在含有氢氟酸的介质中进行分离通常认为是一个难题。由于萃取方法分离不完全,本文采用阴离子交换树脂对资料中报导的氢氟酸、氢氟酸-盐酸、氢氟酸-硝酸三种体系做了比较工作,选用了5M氢氟酸-1M硝酸作为分离铌、
In recent years, the application of cationic surfactants to achieve its micellar solubilization to improve the stability of the complex and the determination of sensitivity, has published a lot of articles. In this paper, the conditions for the determination of aluminum with cetyl pyridinium bromide (CPB) and chrome azure S (CAS) have been tested and satisfactory results have been obtained. In the determination of aluminum in niobium and tantalum metal, prior separation in a medium containing hydrofluoric acid is generally considered to be a problem. Due to the incomplete separation of the extraction method, the anion exchange resin was used to compare the three systems of hydrofluoric acid, hydrofluoric acid-hydrochloric acid and hydrofluoric acid-nitric acid reported in the data. 5M hydrofluoric acid-1 M nitric acid Separation of niobium,