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On-line multidimensional chromatography using supercritical carbon dioxide

✍ Scribed by Christensen, R. G.

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 299 KB
Volume: 8
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240081203

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✦ Synopsis

A two-dimensional chromatographic separation i s described which makes use of the unusual properties of supercritical carbon dioxide mobile phase. This solvent has the property of giving a separation of polycyclic aromatic hydrocarbons (PAH) on amine-bonded columns similar to that given by usual normalphase solvents, and on octadecylsilane-bonded columns similar to that given by usual reversed-phase solvents.

Packed columns were used, arranged so that they could be switched in or out of the solvent flow. Polycyclic aromatic hydrocarbon mixtures isolated from coal tar were fractionated according to number of aromatic carbon atoms on an amine-bonded column, and these fractions were trapped on an octadecyisilanebondedcolumn.Theyweresubsequently eluted according to the polarityof the individualcompounds.Separationsfrom fractions containing 16 and 18 aromatic carbon atoms are shown.

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