Steam chromatography of aliphatic and aromatic amines on packed columns with aqueous potassium hydroxide as the stationary liquid phase

Aqueous alkali was proposed as the stationary liquid phase (SLP) for separation of amines by steam chromatography. Characteristic features of retention of amines of various structures were studied. The retention of primary and secondary amines on aqueous potassium hydroxide as the SLP differs fundamentally from that observed with common organic SLP. Primary amines are eluted in the following order,n-pentylamine <n-butyl-amine <n-propylamine <n-hexylamine <n-octylamine for secondary amines, the following sequence was established; diethylamine < dibutylamine < dimethylamine. Higher-boiling tertiary amines containing ethyl andn-butyl radicals are eluted ahead of diamines containing the same radicals. Translated fromIzvestiya Akademii Nau. Seriya Khimicheskaya, No. 8 pp. 1507–1509, August, 1999.