2‐14C‐Hexanal,trans, trans‐5‐14C‐2,4‐decadienal, 4‐14C‐1‐octen‐3‐ol, 4‐14C‐1‐octen‐3‐one and 1‐14C‐1‐pentanol were synthesized and added to freshly deodorized soybean oil in concentrations ranging from 7–125 ppm. The soybean oil was oxidized, and the fate of the labeled compounds was followed. Hexanal was converted to hexanoic acid especially at 50 C or higher. The 2,4‐decadienal was converted to 2,4‐decadienoic acid at room temperature, and heptenal, 2‐octanal, 2‐nonanal, glyoxal and malonaldehyde were found among the labeled products. 1‐Octen‐3‐ol was converted to 1‐octen‐3‐one at room temperature, but the 1‐octen‐3‐one formed a stable end product that produced no other labeled compounds. 1‐Pentanol was converted to pentanoic acid at 50 C or higher.
U‐14C‐Stearic acid was interesterified into soybean oil and the resulting oil was oxidized to high peroxide values at 25 C and at 125 C. Volatile oxidation products were isolated and found to have a count that was not significantly above background.
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