In this paper, the influence of substituents in sulfonephthalein acid dye onthe spectral properties of their dye ion-pair complex with methylene blue basic dye hasbeen studied, when using 1, 2-dichloroethane as extractant.

• 本文研究了二氯乙烷中取代基对三种苯酚磺酞类酸性染料与碱性染料亚甲蓝形成的染料离子对吸光性质的影响.