Effects of test solutes on the characterization of stationary phases in gas chromatography using a snyder triangle - Shah, P.; Na, H.; Rogers, L.B. (Elsevier)
The effect of the choice of test solutes on the location of a stationary phase in the Snyder selectivity triangle was examined. The properties of proton-donating ability, proton-accepting ability and polarity were estimated using ethanol, dioxane and nitromethane, respectively. Significant changes in the selectivity, e.g., the locations of stationary phases in the triangle, were observed when the solute probes were changed by substituting homologues of ethanol for ethanol. However, modifying the calculation of selectivity so as to obtain a normalized value served to restore a phase to its original position in the selectivity triangle. This resulted in two corners of the triangle not having a representative phase.This study also confirmed the earlier report that additional liquid phases are needed because of the absence of phases in two of the three corners of the selectivity triangle.
http://linkinghub.elsevier.com/retrieve/pii/S0021-9673(01)81890-2
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