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Beef tallow (BT) was extracted by single-pass supercritical CO₂at 345 bar and 40℃ with selected adsorbents (ADS): activated alumina (AA), silica gel (SG), molecular sieve (MS), and magnesium silicate (FL). The lipid yields of the ADS runs were generally lower than those of the no ADS runs and original BT. The extracted lipid of the ADS runs contained lower cholesterol concentration ([chol.]). The major fatty acid distribution showed lower C_(14:0) and unsaturated C_(18) homologs, and higher C_(18:0) while C_(16) homologs showed no change. When the weight ratio of ADS to charged BT was maintained to be 1: 1, the average [chol.] of extracted lipid passed through AA was only half of those that passed through SG and MS. When the different weight ratio of AA and FL to BT was used, the results revealed that higher weight ratio resulted in higher reduction of [chol.] in extracted BT, but gave lower extracted lipid yield. When the weight ratio of 2:1 for AA to BT was used, 88% reduction of cholesterol in BT could be obtained from a modified BT with [chol.] of 20 ㎎/100 g lipid.
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