本文首次系统研究了醇等含氧有机溶剂对铬天青S(CAS)和多元络合物[Ga(Ⅲ)-CAS-CTAB]显色反应的溶剂化效应。有机溶剂化效应可以大幅度地提高多元络合物显色反应的灵敏度和有效地改善性质相近元素的反应选择性。测定了络合物的组成、溶剂化数、溶剂化常数、表观稳定常数。探讨了有机溶剂化效应的机理。 In this paper, the solvating effects of oxygenated organic solvents such as alcohols on the color reactions of chrome azure S (CAS) and multicomponent complexes [Ga (III) -CAS-CTAB] were studied systematically for the first time. The organic solvating effect can greatly improve the sensitivity of the multi-complex color reaction and effectively improve the reaction selectivity of the similar elements. The complex composition, solvation number, solvation constant and apparent stability constant were determined. The mechanism of organic solvation effect was discussed.