Abstract
A method for the determination of poly(ethylene glycols) and poly(oxyethylene) mono- and dialkyl esters in fatty acid ethoxylates by preparative reversed-phase high-performance liquid chromatography is described. The complete separation of these non-ionic compounds has been obtained on a 500 x 20 mm I.D. column packed with C 18 bonded phase with acetone-water as the mobile phase. The separated compounds were subsequently determined by gravimetry.
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