铝—铬天青S—表面活性剂三元络合物用于光度分析已有不少报导。各种表面活性剂的引入对于提高反应的灵敏度,改善反应条件起到良好的作用。特别是两性表面活性剂的引入,不仅大大提高了反应的灵敏度,而且还具有较好的选择性,已用于合金钢中微量铝的分析。但是,由于钛对铝的显色反应有较严重的干扰,在很多测铝体系中钛的允许限量均很小,纯钛及钛合金 Al-chrome azure S-surfactant ternary complex for photometric analysis has been reported. The introduction of various surfactants to improve the sensitivity of the reaction, to improve the reaction conditions play a good role. Especially the introduction of amphoteric surfactants, not only greatly improve the sensitivity of the reaction, but also has good selectivity, has been used for the analysis of trace aluminum in alloy steel. However, titanium has a more serious interference with the color reaction of aluminum. In many aluminum systems, the allowable limit of titanium is very small. Pure titanium and titanium alloy