Reference number
ISO 5506:1988
© ISO 2025
ISO 5506:1988
Soya bean products — Determination of urease activity
Edition 2
1988-08
Withdrawn
Withdrawn (Edition 2, 1988)

Abstract

The method allows inadequate cookingof the products to be detected. It applies to products having a urease activity of less than 1 mg of nitrogen per gram of product as received. For more active products the mass of test may be reduced. The principle consists in mixing of a ground test portion with a buffered urea solution, after keeping the mixture for 30 min at 30 C, neutralization of the ammonia liberated, with an exess of hydrochloric acid solution, and back-titration with standard volumetric hydroxide solution.

General information

  • Status
     : Withdrawn
    Publication date
     : 1988-08
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 2
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 34/SC 2
    ICS :
    67.200.20 
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