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.
Revises
ISO 5506:1978
WITHDRAWN
ISO 5506:1988
95.99
Withdrawal of Standard
Jul 10, 2018
Amended by
ISO 5506:1988/NP Amd 1
PUBLISHED
ISO 5506:2018
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