The stability of vegetable oils IV. Flavor reversion in soybean oil

Bickford, W. G.

doi:10.1007/bf02545417

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…The operation of the apparatus is simple. Carbonate free alkali can be prepared by one of the usual methods (1). Assuming a flask of carbonate free alkali to be at hand the stock bottle is freed of carbon dioxide by attaching the tube in which the buret is subsequently to be mounted to a vacuum line.…”

Section: Apparatus For the Storage And U S E Of Carbonate R E E A L Kmentioning

confidence: 99%

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Molecular distillation of a crude soybean oil

Detwiler¹,

Bull²,

Wheeler³

1943

Oil Soap

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Section: Apparatus For the Storage And U S E Of Carbonate R E E A L Kmentioning

confidence: 99%

“…Molecular distillation has received considerable attention in this laboratory during the past several years and has proved to be a useful tool in studies of the composition of soybean oil (3,7,21).…”

Section: Introductionmentioning

confidence: 99%

Molecular distillation of a crude soybean oil

Detwiler¹,

Bull²,

Wheeler³

1943

Oil Soap

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“…Golmnbie ~nc] Danbert (12) pointed out that only a very small amount of oxygen is required to produce reversion. Furthermore Robinson and Black (13) observed flavor deterioration in soybean oil aged under inert gases, and Bickford (14) reported that reversion could,occur during storage under high vacuum. All these observations can be explained with the present data.…”

Section: Resultsmentioning

confidence: 99%

The relationship between the oxidative polymers of soybean oil and flavor reversion

Chang

Kummerow

1954

J Americ Oil Chem Soc

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Summary The polymers formed during the autoxidation of soybean oil at 60°C. were isolated by a solvent‐extraction method, using diethyl ether and pentanehexane as solvents. The more polar polymer fraction was further oxidized by air at 30°C., and the volatile material obtained was fractionated and characterized. It contained the same carbonyl compounds as the volatile material which has previously been obtained from reverted soybean oil, namely acetaldehyde, propionaldehyde, n‐hexanal, and 2‐pentenal. The more polar polymer fraction contained 21.04% of oxygen and degraded to volatile carbonyl compounds under vacuum as well as under oxygen‐free nitrogen. Depolymerization and ethanolysis of these polymers were carried out in ethyl alcohol which had been adjusted to a normality of 3.5 with anhydrous hydrogen chloride. The polymeric substance formed on the filter presses of a soybean oil refinery could be depolymerized in a similar manner. It is therefore evident that oxidative polymers could be unintentionally introduced into soybean oil in various ways and serve as precursors of reversion compounds.

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“…Both accelerated storage tests and storage in diffused light failed to show that the induction period was lengthened by these deaeration procedures. Bickford (19) reported that deaeration of fresh soybean oil aided in prevention of the development of rancidity when the oils were exposed to light; however, deaeration was accomplished by use of an oil pump and a mercury diffusion pump for a total of 6 hours and the oil stored in sealed glass vials under vacuum, a procedure not practical in industry. Sundberg and Hultberg (20) reported that removal of oxygen from fat in closed containers aided in protecting it against the accelerating effect of visible and ultraviolet light.…”

Section: Deaeration and Deodorizationmentioning

confidence: 99%