Separação de uma mistura de compostos digitalicos em escala semi-preparativa atraves de cromatografia liquida por deslocamento

AUTOR(ES)
DATA DE PUBLICAÇÃO

1994

RESUMO

The technique of high performance displacement chromatographywas applied to the semi-preparative separation of a mixture of threee digitalic glycosides: lanatoside C, digoxin and digitoxin, which are active as cardiotonics. The mobile and stationary phases selected, based on the criteria of high solubility and good separation were: methanol/water 80:20 and 65:35 (v/v) and octadecylsilane (Zorbax ODS 5 mm). Octanol and hexanol were used as displacers in concentrations ranging from 13,6 to 74,4 mg/m in the mobile phase. The isotherms of the compounds and displacers were measured. The effects of variation of temperature, displacer concentration sample volume and column length on the displacement were also studied. This work ilustrates the differences between the preparative separations of overloaded elution and displacement cbromatoghraphy, showing the high potencial of the latter when applied to separation of mixtures in equipament used for analytical scale analyses.

ASSUNTO(S)

digitalina digoxina cromatografia liquida

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