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Open tubular supercritical fluid chromatography of triterpene acids fromDysoxylum pettigrewianum (Meliaceae)

✍ Scribed by Sewram, Vikash ;Nair, Jerald J. ;Mulholland, Dulcie A. ;Raynor, Mark W.

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 393 KB
Volume: 18
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240180608

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✦ Synopsis

Abstract

Open tubular supercritical fluid chromatography (SFC) with carben dioxide as the mobile phase has been investigated for the separation of four triterpene acids, two of which were structural isomers. These compounds, isolated from Dysoxylum pettigrewianum (Meliaceae), were chromatographed on three stationary phases with different selectivities. 30%‐biphenylmethylpolysiloxane and polyethylene glycol (Carbowax 20M) phases exhibited poor chromatographic selectivity for the compounds. The separation was improved by employing the shape selectivity of a liquid crystalline biphenylcarboxylate ester polysiloxane and utilizing simultaneous temperature and pressure programming. The elution order was explained on the basis of the molecular structures of the triterpene acids, and their interaction with the liquid crystal phase.

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