SEPARATION OF T-MAZ ETHOXYLATED SORBITAN FATTY-ACID ESTERS BY SUPERCRITICAL-FLUID CHROMATOGRAPHY

The application of supercritical fluid chromatography (SFC) to the ana lysis of T-MAZ ethoxylated sorbitan fatty acid esters is described. SF C separation methods utilize a density programming technique and a 50 mu m I.D. capillary column. This work demonstrates that capillary colu mn SFC is a powerful technique for the analysis of complex mixtures of many derivatives of ethoxylated sorbitan fatty acids which is not ame nable to gas chromatography or gel permeation chromatography. This wor k also demonstrates that complex distributions of polyethylene glycol can be resolved. The results of this study show how changes in chromat ographic parameters affect the SFC analysis.