International Organization for Standardization

Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation - Second Edition
 N 8968-1

Annotation

This International Standard specifies a method for the determination of the nitrogen content and crude protein calculation of milk and milk products by the Kjeldahl principle, using traditional and block digestion methods.

The methods are applicable to:

- Liquid cow's (whole, partially skimmed or skimmed milk), goat's whole milk;

- Hard, semi-hard and processed cheese;

- Dried milk and dried milk products (including milk-based infant formulae, milk protein concentrate, whey protein concentrate, casein and caseinate).

The methods are not applicable to samples containing ammonium caseinate

NOTE Inaccurate crude protein results will be obtained fi non-milk sources of nitrogen are present in the products specification in this International Standard.

Автоматический перевод:

Молоко и молочные продукты - Определение содержания азота - Часть 1: принцип Kjeldahl и вычисление сырого белка - Второй Выпуск

Этот Международный стандарт определяет метод для определения довольного азота и вычисление сырого белка молока и молочных продуктов принципом Kjeldahl, с помощью традиционного и методы вываривания блока.