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At least 163 records · Page 9Linked to original sources
PubMed1976

Partition high-pressure liquid-chromatographic systems for the separation of digitalis glycosides of the cardenolide group.

Several multi-component liquid-systems have been investigated on silica gel SI-60 supports of particle size 10 mum. By using two solvent systems, it was possible to separate 14 digitalis glycosides, ranging from genins of relatively low polarity to the highly polar deacetyl-lanatosides. Solvents with good ultraviolet transparency at 220 nm (lambdamax. for the butenolide ring) were chosen in order to improve the sensitivity of detection. The technique should also permit the determination of by-products and degradation products of these drug substances. Detection limits are as low as 15 ng for a 5 mul injection, and separation times vary between 4 and 20 min. The reproducibility of the retention times and the baseline separations attainable make the systems suitable for quantitative work.

Cardanolides↗
PubMed1975

Behaviour of cardiac glycosides and cardenolides related to digitoxigenin on sephadex LH-20.

The behaviour of six cardenolides and eight cardiac glycosides related to digitoxigenin during column chromatography on Sephadex LH-20 gel has been investigated. Complete resolution was obtained for mixtures of digitoxigenin, gitoxigenin and digoxigenin, but not for those of the 3-epimeric cardenolides. It was possible to achieve a group separation of cardenolides and their glycosides of the digitoxigenin series from those of the digoxigenin or gitoxigenin series.

Cardanolides↗