ISO 5506-1988 大豆制品 尿素酶活性的测定

标准号：ISO 5506-1988
中文标准名称：大豆制品 尿素酶活性的测定
英文标准名称：Soya bean products; determination of urease activity
标准类型：X11
发布日期：1999/12/31 12:00:00
实施日期：1988/8/15 12:00:00
中国标准分类号：X11
国际标准分类号：67.060
适用范围：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.