Adsorptive capacity of active filter aids for used cooking oil

Abstract

Many materials are purported to adsorb polar compounds that are the result of degradation of oils used for deep‐fat frying. In the present study, the capacity of several of these adsorbents in terms of the amount of polar oil degradation compounds adsorbed by a given weight of material was determined. A significant difference in the adsorptive characteristics and capacity of the materials tested was demonstrated. Adsorptive capacity varied from 0 to over 150 mg of total polar compounds per gram of adsorbent. Some of the materials demonstrated selective adsorption characteristics. For these materials, only one class of polar compounds was adsorbed.