Journal of the American Oil Chemists’ Society

, Volume 33, Issue 8, pp 360–363

Urease activity in soybean meal products


  • Allan K. Smith
    • Northern Utilization Research Branch
  • Paul A. Belter
    • Northern Utilization Research Branch
  • Robert L. Anderson
    • Northern Utilization Research Branch

DOI: 10.1007/BF02665111

Cite this article as:
Smith, A.K., Belter, P.A. & Anderson, R.L. J Am Oil Chem Soc (1956) 33: 360. doi:10.1007/BF02665111


A method which uses direct titration of ammonia as a measure of urease activity was modified for use in the assay of raw and of slightly denatured soybean meal. The modifications which were adopted were the use of glutathione, a presoaking of the sample for 30 min. at 40°C., and making of the assay at 40°C. Data on the urease activity of several varieties of soybeans, and for immature and frost-damaged soybeans were determined.

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© The American Oil Chemists’ Society 1956