The retention of analgin, caffeine, phenobarbital, and codeine—components of the medicine Pentalgin N—on a chromatographic
column filled with the Nova-Pak CN HP sorbent with modifying nitrile groups as a function of the pH of the mobile phase, the
concentrations of the organic modifier acetonitrile and potassium dihydrogen phosphate in the mobile phase was studied. The
optimum conditions of the separation of the components were selected.
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Translated from Zhurnal Analiticheskoi Khimii, Vol. 60, No. 12, 2005, pp. 1267–1272.
Original Russian Text Copyright © 2005 by Golubitskii, Budko, Ivanov.