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将阳离子表面活性剂、非离子表面活性剂和阴阳离子表面活性剂应用于铝(Al)-铬天青S(CAS)体系以测定微量铝,已有不少报导,对提高反应的灵敏度,改善反应条件取得了良好的效果,有的体系已用于钢铁中微量铝的测定。我们曾把两性表面活性剂用于稀士元素的分析,表现出灵敏度高,选择性强,水溶性、稳定性好等优点。本文试图把两性表面活性剂应用于Al-CAS体系,研究其分光光度性质和反应机理,并寻求一个高灵敏度测定微量铝的新方法。试验证明,两性表面活性剂:N-十二烷基二甲基铵基乙酸(DDMAA),N-十二烷基二聚氧乙烯铵基乙酸(DDPAA)均能与铝、铬天青S形成三元胶束络合物,并表现出突出
The application of cationic surfactants, nonionic surfactants and anionic surfactants to the aluminum (Al) -chromium azure S (CAS) system for the determination of trace amounts of aluminum has been reported in many cases to improve the sensitivity of the reaction and to improve The reaction conditions have achieved good results, and some systems have been used for the determination of trace aluminum in steel. We have amphoteric surfactants for the analysis of rare earth elements, showing high sensitivity, selectivity, water solubility, good stability and so on. This article attempts to apply amphoteric surfactants to the Al-CAS system, investigate its spectrophotometric properties and reaction mechanism, and seek a new method for the high sensitivity determination of trace aluminum. Experiments show that amphoteric surfactants: N-dodecyldimethylammonioacetic acid (DDMAA) and N-dodecyldiethoxyethyleneaminoacetic acid (DDPAA) can form with aluminum and chrome azure S Ternary micellar complexes, and show prominence