Comparison of a conventional extractor with two unconventional extractors

Aue, Walter A.; Wickramanayake, Palitha P.; Müller, Jürgen

doi:10.1016/s0003-2670(01)85064-9

Cited by 4 publications

(1 citation statement)

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“…The synthesis of the bonded phases was carried out in refluxing hexadecane under nitrogen as described earlier for CW-20M (4), followed by exhaustive extraction with methanol in a high-speed apparatus (72). Unless otherwise noted, Surfynol was added at 6 weight% load to Chromosorb and at 60% load to the other supports.…”

Section: Methodsmentioning

confidence: 99%

A bonded polyoxyethylene phase for gas and liquid chromatography

Wickramanayake¹,

Aue²

1986

Can. J. Chem.

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Can. J. Chem. 64,470 (1986).Bonded phases were produced by reacting 2,4,7,9-tetramethyl-5-decyne-4,7-bis(polyethyleneoxide 30 mol) ether (SurfYnolG3 485) with silicic supports of high and low surface area. There is circumstantial evidence (a) that the nonextractable layer is held by multiple hydrogen bonding and (b) that the synthesis of these packings involves a reaction at the crosslinking site of the surfactant. The bonded phases, with layer thicknesses between 10 and 30 A, were tested with three chromatographic techniques.In gas-solid chromatography, the phase proved well deactivated and yielded a reduced plate height of 2.5 (using a silica gel support). In gel permeation chromatography, polyethyleneglycols eluted within the mobile-phase volume. In liquid-solid (normal-phase adsorption) chromatography, the elution pattern differed significantly from that of unmodified silica gel. In each case, high-efficiency separations were obtained. ' The chromatographic experiments thus demonstrated the potential usefulness of the new phase for both gas and liquid chromatography. However, it was not tested in direct comparison with conventional phases nor was its utility established by subjecting it to routine analytical use.

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Section: Methodsmentioning

confidence: 99%