ISO 5506:1988

Soya bean products — Determination of urease activity

Publication date:   Aug 18, 1988

95.99 Withdrawal of Standard   Jul 10, 2018

General information

95.99 Withdrawal of Standard   Jul 10, 2018

ISO

ISO/TC 34/SC 2 Oleaginous seeds and fruits and oilseed meals

International Standard

67.200.20   Oilseeds

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 5506:1978

NOW

WITHDRAWN
ISO 5506:1988
95.99 Withdrawal of Standard
Jul 10, 2018

CORRIGENDA / AMENDMENTS

ABANDON
ISO 5506:1988/NP Amd 1

REVISED BY

PUBLISHED
ISO 5506:2018