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The adsorption of the vitamin A suppressing factor from soybean oil¹

Departments of Agricultural Chemistry and Dairy Husbandry, Purdue University Agricultural Experiment Station, Lafayette, Indiana

ABSTRACT

1. Crude soybean oil was treated with two different absorbents in an attempt to remove the vitamin A suppressing factor which interferes with the transference of the vitamin A activity of feed to the butterfat secreted by dairy cows.
   
2. It was found that Nuchar removed the factor from the oil while the special sodium aluminum silicate adsorbent was without effect.
   
3. The action of the Nuchar was proven to be that of adsorption rather than inactivation
   
4. Acetone did not elute the active principle adsorbed on Nuchar although acetone did extract oil, sterol glucosides, coloring matter and other substances.
   

¹ Published with the approval of the Director of the Purdue University Agricultural Experiment Station.