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The synergistic effect is investigated in mixed gas chromatographic stationary phases containing dibenzo-18-crown-6 + MPBHpB [o-methyl-p-phenylene-bis-(p-heptoxy benzoate)], with benzene/cyclohexane, cyclohexane/hexane, halogenated hydrocarbons, aromatics, ketones, phenols, alcohols and aniline derivatives as sample compound pairs. Some of the separations reveal positive or negative synergistic effect...
The gas chromatographic separation of xylene isomers using special mixed stationary phases consisting of heptakis(2.3.6-tri-O-pentyl)-β-CD-AgNO 3 , heptakis (2.3.6-tri-O-pentyl)-β-CD-TlNO 3 or bentone-34-AgNO 3 is investigated. The first two have positive synergistic effects for the separation of m, and p-xylene isomers, but negative synergistic effects for the m, and o-isomers...
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