Abstract
A fraction of the solid phase of grape pomace was extracted using water and dilute solutions of tetra-sodium ethylenediaminetetra-acetate (EDTA), sodium hydroxide, and hydrochloric acid (HCl). The water extract resulted in the highest viscosity numbers, and the HCl extract in the lowest. By characterizing the EDTA extract, the hydrodynamically equivalent dispersions were shown to be pseudoplastic. The viscosity of the dispersions varied logarithmically with reciprocal, absolute temperature and showed a resistance to settling in the presence of electrolytes and ethanol. Thus, the extract may exhibit hydrocolloidal functionality in a wide variety of foods and beverages.
- Received February 1985.
- Copyright 1985 by the American Society for Enology and Viticulture
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Vol 36 Issue 4
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