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Effect of relative humidity on the determination of oil in soybeans

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Oil & Soap

Conclusions

From the results shown it may be concluded that the percent of extractable material which is obtained is highly dependent upon the atmospheric conditions under which the sample is analyzed. when soybean meals with moisture content from 4.35 to 16.8 percent are analyzed for oil content at 75–80 percent relative humidity, the amount of extractable material is not dependent upon the original moisture level. However, at lower relative humidities or lower moisture levels this is not true. Under conditions of relatively high humidity with meals of high moisture content, the short two-hour extraction gives results which check satisfactorily with the results obtained by the official four-hour method under like conditions. The data tend to emphasize the fact that the determination of oil in soybeans is empirical and that any analysis does not necessarily represent the total amount of lipids present in the sample. The data shows the necessity of control of moisture conditions under which seed is stored and under which it is analyzed if reproducible results are to be obtained.

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Author information

Authors and Affiliations

  1. U. S. Regional Soybean Laboratory, Urbana, Illinois

    Orland A. Krober (Assistant Chemists) & F. I. Collins (Assistant Chemists)

Authors
  1. Orland A. Krober
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  2. F. I. Collins
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Additional information

The U. S. Regional Soybean Laboratory is a cooperative organization participated in by the Bureau of Plant Industry. Soils, and Agricultural Engineering, Agricultural Research Administration, U. S. Department of Agriculture; and the Agricultural Experiment Stations of the North Central States of Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin.

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Krober, O.A., Collins, F.I. Effect of relative humidity on the determination of oil in soybeans. Oil Soap 21, 1–5 (1944). https://doi.org/10.1007/BF02593146

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  • DOI: https://doi.org/10.1007/BF02593146

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