Kiciak S
Department of Physical Chemistry, Technical University, Poznań, Poland.
Talanta. 1989 Nov;36(11):1101-6. doi: 10.1016/0039-9140(89)80008-6.
Several aqueous organic solvent systems have been investigated for the extractive separation of Xylenol Orange (XO), Semi-Xylenol Orange (SXO) and o-Cresol Red (CR). Four methods of determination of the extracted species were used. The best separation of CR and SXO was obtained with aqueous 1-butanol and of SXO and XO with the 0.5M sulphuric-1-butanol system.