Abstract
The article presents research data on the functional composition of dietary fiber from quince, apple and pumpkin by absorption infrared spectroscopy. An assessment of the potential cation exchange activity of the fibers depending on the pH of the medium by comparing the intensities of the characteristic absorption bands was carried out. Under the conditions of biological media close to acidity, sorption of Pb2 +, Co2 +, Cd2 + cations from solutions of their salts was carried out. The potential sorption activity of dietary fiber from apple in relation to Pb2 + and Co2 + is shown. For pumpkin fibers a number of selectivity is predicted: Pb2+ > Cd2+ > Co2+.
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