Abstract
The difference in amounts of β-carotene adsorbed on attapulgite and sepiolite was discussed on the basis of adsorption isotherm from alkali-refined rape seed and soybean oils. The amounts adsorbed on attapulgites were larger than those on sepiolites. The difference in the amounts adsorbed on attapulgite and sepiolite could not be explained using their surface area, pore size distribution, acid strength, acidity or free fatty acids. It was concluded that triolein was competing with β-carotene for adsorption sites of attapulgite and sepiolite and that sepiolite was more accessible to triolein competition than attapulgite.
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