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Stability of polydextrose solutions to heat treatment and storage under acid conditions



Stability of polydextrose solutions to heat treatment and storage under acid conditions



Lebensmittel-Wissenschaft & Technologie 24(3): 245-251



The stability of polydextrose to processing and storage under several conditions was studied on model solutions. Heat-treatments at 70, 85 and 100.degree. C were applied for up to 5 h on solutions in the pH range from 3.0 to 6.0. The samples were stored at -20, 5, 20 and 40.degree. C for up to 30 weeks. After heat-treatments as well as at regular intervals during storage, polydextrose recovery was determined by HPLC and free glucose content enzymatically. It was demonstrated that polydextrose remains stable to all treatments and storage conditions in the pH range from 4.5 to 6.0. Under more acid conditions an increase in free glucose and a decrease in polydextrose content were observed, these are dependent on incubation as well as storage time and temperature. These observations were confirmed by gel filtration on Sephadex G-15 where marked shifts in the molecular weight distribution of polydextrose solutions were noticeable.

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Accession: 007815519

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