ISO 17997-1:2004

INTERNATIONAL ISO
STANDARD 17997-1
IDF
29-1
First edition
2004-09-15

Milk — Determination of casein-nitrogen
content —
Part 1:
Indirect method (Reference method)
Lait — Détermination de la teneur en azote de caséine —
Partie 1: Méthode indirecte (Méthode de référence)




Reference numbers
ISO 17997-1:2004(E)
IDF 29-1:2004(E)
©
ISO and IDF 2004

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ISO 17997-1:2004(E)
IDF 29-1:2004(E)
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ii © ISO and IDF 2004 – All rights reserved

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ISO 17997-1:2004(E)
IDF 29-1:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has
been established has the right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17997-1IDF 29-1 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee
SC 5, Milk and milk products, and the International Dairy Federation (IDF), in collaboration with AOAC
International. It is being published jointly by ISO and IDF and separately by AOAC International.
ISO 17997IDF 29 consists of the following parts, under the general title Milk — Determination of casein-
nitrogen content:
 Part 1: Indirect method (Reference method)
 Part 2: Direct method
© ISO and IDF 2004 – All rights reserved iii

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ISO 17997-1:2004(E)
IDF 29-1:2004(E)
Foreword
IDF (the International Dairy Federation) is a worldwide federation of the dairy sector with a National
Committee in every member country. Every National Committee has the right to be represented on the IDF
Standing Committees carrying out the technical work. IDF collaborates with ISO and AOAC International in
the development of standard methods of analysis and sampling for milk and milk products.
Draft International Standards adopted by the Action Teams and Standing Committees are circulated to the
National Committees for voting. Publication as an International Standard requires approval by at least 50% of
IDF National Committees casting a vote.
ISO 17797-1IDF 29-1 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee
SC 5, Milk and milk products, and the International Dairy Federation (IDF), in collaboration
...