engleski

HPSEC with Component Analysis of Citrus and Apple Pectins After Hollow Fiber Ultrafiltration

Component analysis of high performance size exclusion chromatograms was applied to 3.3 x concentration of citrus and apple pectins in dilute solution by ultrafiltration with a hollow fiber module with a 100K membrane . Viscosities of the pectins in retained solutions were unchanged and for citrus pectin there was a 10 percent reduction of weight fraction of the largest - sized component at the last stage of concentration. A small proportion of apple pectin (radius of gyration - 7 nm) was recovered from one permeate by freeze - drying, and, when redissolved in water, produced large aggregates (z-average diam more than 100 nm, measured by dinamic light scattering). Results can provide guidelines for use of the method during industrial processing.

citrus pectin; apple; hollow fiber; ultrafiltration; size - exclusion

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