ISO 9877

Milk and milk products — Determination of ash

This document specifies a method for the determination of the ash content in milk, milk powder, whey powder, whey protein concentrate, infant formula, milk permeate powder and milk protein concentrate. NOTE For the determination of ash (“fixed ash”) of caseins and caseinates, see ISO 5544 | IDF 89[1].

Lait et produits laitiers — Détermination des cendres

General Information

• Status: Not Published
• ICS: 67.100.01 - Milk and milk products in general
• Technical Committee: ISO/TC 34/SC 5 - Milk and milk products
• Drafting Committee: ISO/TC 34/SC 5 - Milk and milk products
• Current Stage: 6000 - International Standard under publication
• Start Date: 17-Mar-2026
• Completion Date: 11-Apr-2026

Overview

ISO/PRF 9877: Milk and milk products - Determination of ash is an international standard developed by ISO and the International Dairy Federation (IDF). This standard outlines a method for determining the ash content in a wide range of milk and dairy products. The method applies to liquid milk, milk powder, whey powder, whey protein concentrate, infant formula, milk permeate powder, and milk protein concentrate.

Accurate measurement of ash content is critical in quality control, nutritional labeling, and product consistency within the dairy industry. This standardized method promotes reliable results and comparability across laboratories worldwide.

Key Topics

• Scope of Application: The standard covers various dairy products, including raw and processed milks, milk powders, protein concentrates, infant formulas, and permeate powders.
• Principle: The method involves heating a test portion to 550 °C ± 25 °C, incinerating organic material, and quantifying the residue (ash) by mass difference.
• Essential Equipment:
  • Analytical balance (precision to 0.0001 g)
  • High-temperature furnace (550 °C ± 25 °C)
  • Silica, porcelain, quartz crucibles, or platinum dishes
  • Desiccator and thermogravimetric analyser (optional)
• Sample Preparation: Procedures vary for liquid and dried products, emphasizing representative sampling and careful moisture handling.
• Incineration and Ashing:
  • Controlled charring and ashing procedures to avoid loss or contamination
  • Use of fiberglass pads to aid evaporation for liquid samples
  • Ashing continues until samples reach constant mass
• Expression of Results: Ash content is reported as a percentage by mass, ensuring results are precise and comparable.
• Precision Criteria: The standard details repeatability and reproducibility limits, established through international collaborative studies, to support confidence in results across laboratories.

Applications

ISO/PRF 9877 is essential for:

• Quality Control: Dairy producers and laboratories use ash determination to monitor mineral content and product quality.
• Product Development and Formulation: Ensures formulations meet regulatory and nutritional requirements for minerals.
• Regulatory Compliance: Satisfies requirements for labeling and legal standards in many markets.
• Research and Analysis: Enables consistent ash content analysis for scientific studies on milk and milk products.
• Process Optimization: Helps manufacturers control process parameters like concentration and drying, which affect ash content.

Due to the standard's robust methodology and precision, it is especially valuable for third-party quality verification, contract testing, and trade of dairy ingredients.

Related Standards

When implementing ISO/PRF 9877, consider the following complementary standards for sampling and analysis of dairy products:

• ISO 707 - Milk and milk products - Guidance on sampling
• ISO 3310-1 - Test sieves - Technical requirements and testing
• ISO 5544 | IDF 89 - Determination of fixed ash in caseins and caseinates (when working with specific milk protein products)
• ISO 5725-2 - Accuracy (trueness and precision) of measurement methods and results - Guidelines on repeatability and reproducibility

ISO/PRF 9877 integrates seamlessly with these international standards to facilitate reliable, standardized testing and ensure accurate determination of ash in milk and milk products across the global dairy supply chain.

Standards Content (Sample)

International
Standard
IDF 258
First edition
Milk and milk products —
Determination of ash
Lait et produits laitiers — Détermination des cendres
PROOF/ÉPREUVE
Reference numbers
IDF 258:2026(en) © ISO and IDF 2026

IDF 258:2026(en)
© ISO and IDF 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office International Dairy Federation
CP 401 • Ch. de Blandonnet 8 Silver Building • Bd Auguste Reyers 70/B
CH-1214 Vernier, Geneva B-1030 Brussels
Phone: [phone] Phone: [phone]
Fax: [phone]
Email: [e-mail] Email: [e-mail]
Website: www.iso.org Website: www.fil-idf.org
Published in Switzerland
PROOF/ÉPREUVE
ii
IDF 258:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Sampling . 2
7 Preparation of the test sample. 2
7.1 Milk powder, whey powder, whey protein concentrate, infant formula, milk permeate
powder and milk protein concentrate .2
7.2 Whole, partially skimmed or skimmed liquid milk .2
8 Determination . 2
8.1 Preparation of the dish.2
8.2 Test portion .3
8.3 Charring . .3
8.4 Ashing .3
9 Expression of results . 3
10 Precision . 4
10.1 General .4
10.2 Repeatability .4
10.3 Reproducibility . .4
Annex A (informative) Ashing time . 6
Annex B (informative) Precision data . 7
Bibliography . 8
PROOF/ÉPREUVE
iii
IDF 258:2026(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 5, Milk
and milk products, and the International Dairy Federation (IDF). It is being published jointly by ISO and IDF.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
PROOF/ÉPREUVE
iv
IDF 258:2026(en)
IDF (the International Dairy Federation) is a non-profit private sector organization representing the
interests of various stakeholders in dairying at the global level. IDF members are organized in National
Committees, which are national associations composed of representatives of dairy-related national interest
groups including dairy farmers, dairy processing industry, dairy suppliers, academics and governments/
food control authorities.
ISO and IDF collaborate closely on all matters of standardization relating to methods of analysis and
sampling for milk and milk products. Since 2001, ISO and IDF jointly publish their International Standards
using the logos and reference numbers of both organizations.
IDF draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IDF takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, IDF had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. IDF shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
This document was prepared by the IDF Standing Committee on Analytical Methods for Composition and
ISO Technical Committee ISO/TC 34, Food products, Subcommittee SC 5, Milk and milk products. It is being
published jointly by IDF and ISO.
The work was carried out by the IDF/ISO Action Team on Determination of Ash in milk products, including
dairy permeates powders (C43) of the Standing Committee on Analytical Methods for Composition, under the
aegis of its project leader Mr Richard Johnson (NZ).
PROOF/ÉPREUVE
v
International Standard
IDF 258:2026(en)
Milk and milk products — Determination of ash
1 Scope
This document specifies a method for the determination of the ash content in milk, milk powder, whey
powder, whey protein concentrate, infant formula, milk permeate powder and milk protein concentrate.
[1]
NOTE For the determination of ash (“fixed ash”) of caseins and caseinates, see ISO 5544 | IDF 89 .
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
ash
residual substances following incineration in air.
Note 1 to entry: Ash is determined by the procedure described in this document.
Note 2 to entry: Ash of mil
...

DRAFT
International
Standard
ISO/DIS 9877
IDF 258
ISO/TC 34/SC 5
Milk and milk products —
Secretariat: NEN
Determination of ash
Voting begins on:
ICS: 67.100.01
2025-06-27
Voting terminates on:
2025-09-19
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
This document is circulated as received from the committee secretariat.
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference numbers
ISO/DIS 9877:2025(en)
IDF 258:2025(en)
DRAFT
ISO/DIS 9877:2025(en)
International
Standard
ISO/DIS 9877
IDF 258
ISO/TC 34/SC 5
Milk and milk products —
Secretariat: NEN
Determination of ash
Voting begins on:
ICS: 67.100.01
Voting terminates on:
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
© ISO and IDF 2025
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
USER PURPOSES, DRAFT INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
STANDARDS MAY ON OCCASION HAVE TO
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
This document is circulated as received from the committee secretariat. BE CONSIDERED IN THE LIGHT OF THEIR
or ISO’s member body in the country of the requester.
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
ISO copyright office International Dairy Federation
NATIONAL REGULATIONS.
CP 401 • Ch. de Blandonnet 8 Silver Building • Bd Auguste Reyers 70/B
RECIPIENTS OF THIS DRAFT ARE INVITED
CH-1214 Vernier, Geneva B-1030 Brussels
TO SUBMIT, WITH THEIR COMMENTS,
Phone: [phone] Phone: [phone]
NOTIFICATION OF ANY RELEVANT PATENT
Fax: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail] Email: [e-mail]
Website: www.iso.org Website: www.fil-idf.org
Reference numbers
Published in Switzerland ISO/DIS 9877:2025(en)
IDF 258:2025(en)
ii
ISO/DIS 9877:2025(en)
IDF 258:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Sampling . 2
7 Preparation of the test sample. 2
8 Determination . 2
8.1 Preparation of the dish.2
8.2 Test portion .3
8.3 Charring . .3
8.4 Ashing .3
9 Expression of results . 3
10 Precision . 4
10.1 General .4
10.2 Repeatability .4
10.3 Reproducibility . .4
Annex A (informative) Ashing time . 6
Annex B (informative) Precision data . 7
Bibliography . 8

iii
ISO/DIS 9877:2025(en)
IDF 258:2025(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 34 Food Products, Subcommittee SC 5, Milk
and milk products, and the International Dairy Federation (IDF). It is being published jointly by ISO and IDF.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/DIS 9877:2025(en)
IDF 258:2025(en)
IDF (the International Dairy Federation) is a non-profit private sector organization representing the
interests of various stakeholders in dairying at the global level. IDF members are organized in National
Committees, which are national associations composed of representatives of dairy-related national interest
groups including dairy farmers, dairy processing industry, dairy suppliers, academics and governments/
food control authorities.
ISO and IDF collaborate closely on all matters of standardization relating to methods of analysis and
sampling for milk and milk products. Since 2001, ISO and IDF jointly publish their International Standards
using the logos and reference numbers of both organizations.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IDF shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute and endorsement.
This document was prepared by the IDF Standing Committee on Analytical Methods for Composition and
ISO Technical Committee ISO/TC 34, Food products, Subcommittee SC 5, Milk and milk products. It is being
published jointly by IDF and ISO.
The work was carried out by the IDF/ISO Action Team on Determination of Ash in milk products, including
dairy permeates powders (C43), of the Standing Committee on Analytical Methods for Composition, under the
aegis of its project leader Mr. Richard Johnson (NZ).

v
ISO/DIS 9877:2025(en)
DRAFT International Standard
IDF 258:2025(en)
Milk and milk products — Determination of ash
1 Scope
This document specifies a method for the determination of the ash content in milk, milk powder, whey
powder, whey protein concentrate, infant formula, milk permeate powder and milk protein concentrate.
Note For the determination of
...

revISO/DIS ISO/PRF 9877:2026(en)
IDF 258
ISO/TC 34/SC 5
Secretariat: NEN
Date: 2026-01-0802-16
Milk and milk products — Determination of ash
Lait et produits laitiers — Détermination des cendres
PROOF
ISO/PRF 9877 | IDF 258:2026(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
E-mail: [e-mail]
Website: www.iso.org
International Dairy Federation
Silver Building • Bd Auguste Reyers 70/B
B-1030 Brussels
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.fil-idf.org
Published in Switzerland
ii
ISO/PRF 9877 | IDF 258:2026(en)
Contents
Foreword . Error! Bookmark not defined.
1 Scope . Error! Bookmark not defined.
2 Normative references . Error! Bookmark not defined.
3 Terms and definitions . Error! Bookmark not defined.
4 Principle. Error! Bookmark not defined.
5 Apparatus . Error! Bookmark not defined.
6 Sampling . Error! Bookmark not defined.
7 Preparation of the test sample . Error! Bookmark not defined.
7.1 Milk powder, whey powder, whey protein concentrate, infant formula, milk permeate
powder and milk protein concentrate . Error! Bookmark not defined.
7.2 Whole, partially skimmed or skimmed liquid milk . Error! Bookmark not defined.
8 Determination . Error! Bookmark not defined.
8.1 Preparation of the dish . Error! Bookmark not defined.
8.2 Test portion . Error! Bookmark not defined.
8.3 Charring . Error! Bookmark not defined.
8.4 Ashing . Error! Bookmark not defined.
9 Expression of results . Error! Bookmark not defined.
10 Precision . Error! Bookmark not defined.
10.1 General . Error! Bookmark not defined.
10.2 Repeatability . Error! Bookmark not defined.
10.3 Reproducibility . Error! Bookmark not defined.
(informative) Ashing time. Error! Bookmark not defined.
(informative) Precision data . Error! Bookmark not defined.
Bibliography . Error! Bookmark not defined.

iii
ISO/PRF 9877 | IDF 258:2026(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 5, Milk and
milk products, and the International Dairy Federation (IDF). It is being published jointly by ISO and IDF.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/PRF 9877 | IDF 258:2026(en)
IDF (the International Dairy Federation) is a non-profit private sector organization representing the interests
of various stakeholders in dairying at the global level. IDF members are organized in National Committees,
which are national associations composed of representatives of dairy-related national interest groups
including dairy farmers, dairy processing industry, dairy suppliers, academics and governments/food control
authorities.
ISO and IDF collaborate closely on all matters of standardization relating to methods of analysis and sampling
for milk and milk products. Since 2001, ISO and IDF jointly publish their International Standards using the
logos and reference numbers of both organizations.
IDF draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IDF takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, IDF had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. IDF shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute andan endorsement.
This document was prepared by the IDF Standing Committee on Analytical Methods for Composition and ISO
Technical Committee ISO/TC 34, Food products, Subcommittee SC 5, Milk and milk products. It is being
published jointly by IDF and ISO.
The work was carried out by the IDF/ISO Action Team on Determination of Ash in milk products, including dairy
permeates powders (C43), of the Standing Committee on Analytical Methods for Composition, under the aegis of
its project leader Mr Richard Johnson (NZ).
v
ISO/PRF 9877 | IDF 258:2026(en)
Milk and milk products — Determination of ash
1 Scope
This document specifies a method for the determination of the ash content in milk, milk powder, whey powder,
whey protein concentrate, infant formula, milk permeate powder and milk protein concentrate.
[1]
NOTE For the determination of ash (“fixed ash”) of caseins and caseinates, see ISO 5544 | IDF 89 .
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
ash
residual substances following incineration in air.
Note 1 to entry: Ash is determined by the procedure described in this document.
Note 2 to entry: Ash of milk products is conventionally expressed as a percentage by mass, numerically equivalent to
grams per 100 g of product.
4 Principle
The ash residue is determined, by difference in mass, by applying an incineration procedure, at 550 °C ± 25 °C,
to the test portion.
5 Apparatus
The usual laboratory apparatus, and in particular the following shall be used.
5.1 Analytical balance, capable of weighing to the nearest 0,000 1 g.
5.2 Silica, porcelain or quartz crucibles or platinum dishes, of diameter about 70 mm and depth 25 mm
to 50 mm.
5.3 Electrical furnace, with air circulation, capable of being controlled at 550 °C ± 25 °C.
5.4 Desiccator, suitable for high temperature application, containing an effective desiccant.
ISO/PRF 9877 | IDF 258:2026(en)
1)
5.5 Thermogravimetric analyser (TGA) , incorporating analytical balance (5.1), electrical furnace (5.3)
and suitable dishes. The dishes will not always conform
...

PROJET
Norme
internationale
ISO/DIS 9877
FIL 258
ISO/TC 34/SC 5
Lait et produits laitiers —
Secrétariat: NEN
Détermination des cendres
Début de vote:
Milk and milk products — Determination of ash
2025-06-27
ICS: 67.100.01
Vote clos le:
2025-09-19
CE DOCUMENT EST UN PROJET DIFFUSÉ
POUR OBSERVATIONS ET APPROBATION. IL
EST DONC SUSCEPTIBLE DE MODIFICATION
ET NE PEUT ÊTRE CITÉ COMME NORME
INTERNATIONALE AVANT SA PUBLICATION EN
TANT QUE TELLE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES
FINS INDUSTRIELLES, TECHNOLOGIQUES ET
COMMERCIALES, AINSI QUE DU POINT DE VUE
DES UTILISATEURS, LES PROJETS DE NORMES
INTERNATIONALES DOIVENT PARFOIS ÊTRE
CONSIDÉRÉS DU POINT DE VUE DE LEUR
Ce document n’a pas été rédigé par le Secrétariat central de l’ISO.
POSSIBILITÉ DE DEVENIR DES NORMES
POUVANT SERVIR DE RÉFÉRENCE DANS LA
RÉGLEMENTATION NATIONALE.
LES DESTINATAIRES DU PRÉSENT PROJET
SONT INVITÉS À PRÉSENTER, AVEC LEURS
OBSERVATIONS, NOTIFICATION DES DROITS
DE PROPRIÉTÉ DONT ILS AURAIENT
ÉVENTUELLEMENT CONNAISSANCE
ET À FOURNIR UNE DOCUMENTATION
Numéros de référence EXPLICATIVE.
ISO/DIS 9877:2025(fr)
© ISO et FIL 2025
FIL 258:2025(fr)
ISO/DIS 9877:2025(fr)
Ȁ 34Ȁ 5
ƒ–‡ǣ 2025-06-27
ISO/DIS 9877:2025(fr)
FIL 258:2025(fr)
‡…”±–ƒ”‹ƒ–ǣ NEN
Lait et produits laitiers — Détermination des cendres
Milk and milk products — Determination of ash

DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO et FIL 2025
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office International Dairy Federation
Case postale 401 • Ch. de Blandonnet 8 Silver Building • Bd Auguste Reyers 70/B
CH-1214 Vernier, Genève B-1030 Brussels
Tél.: [phone] Tél.: + 32 2 325 67 40
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ISO/DIS 9877:2025(fr)
FIL 258:2025(fr)
Sommaire Page
Avant-propos . iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe . 2
5 Appareillage . 2
6 Échantillonnage . 2
7 Préparation de l’échantillon pour essai . 3
8 Détermination . 3
8.1 Préparation de la capsule . 3
8.2 Prise d'essai . 3
8.3 Carbonisation . 3
8.4 Incinération . 4
9 Expression des résultats . 4
10 Fidélité . 4
10.1 Généralités . 4
10.2 Répétabilité . 5
10.3 Reproductibilité . 5
Annexe A (informative) Durée d'incinération . 7
Annexe B (informative) Données de fidélité . 9
Bibliographie . 10

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ISO/DIS 9877:2025(fr)
FIL 258:2025(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en
général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit
de faire partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales
et non gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore
étroitement avec la Commission électrotechnique internationale (IEC) en ce qui concerne la
normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir https://www.iso.org/directives).
L’attention est attirée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de brevet. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de
brevet. Les détails concernant les références aux droits de brevet identifiés lors de l’élaboration du
document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de brevets reçues par
l’ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion
de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir le lien suivant : www.iso.org/iso/fr/avant-propos.html
Le présent document a été élaboré par le comité technique ISO/TC 34, Produits alimentaires,
sous-comité SC 5, Lait et produits laitiers, et par la Fédération internationale du lait (FIL). Il est publié
conjointement par l’ISO et la FIL.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
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ISO/DIS 9877:2025(fr)
FIL 258:2025(fr)
La FIL (Fédération internationale du lait) est une organisation privée à but non lucratif qui représente les
intérêts des divers acteurs de la filière laitière au niveau international. Les membres de la FIL sont
organisés en comités nationaux, qui sont des associations nationales composées de représentants de
groupes d’intérêt nationaux dans le secteur des produits laitiers, incluant des producteurs laitiers, des
acteurs de l'industrie de transformation des produits laitiers, des fournisseurs de produits laitiers, des
universitaires et des représentants des gouvernements/autorités chargées du contrôle des aliments.
L’ISO et la FIL collaborent étroitement à toutes les activités de normalisation concernant les méthodes
d'analyse et d'échantillonnage du lait et des produits laitiers. Depuis 2001, l’ISO et la FIL publient
conjointement leurs Normes internationales en utilisant les logos et les numéros de référence des deux
organisations.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de brevet. La FIL ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de
brevet. Les détails concernant les références aux droits de brevet identifiés lors de l’élaboration du
document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de brevets reçues par
l’ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Le présent document a été élaboré par le Comité permanent de la FIL en charge des méthodes d’analyse
de la composition et par le comité technique ISO/TC 34, Produits alimentaires, sous-comité SC 5, Lait et
produits laitiers. Il est publié conjointement par l’ISO et la FIL.
Les travaux ont été confiés à l’équipe d’action FIL/ISO sur la Détermination des cendres dans les produits
laitiers, y compris les poudres de perméats laitiers (C43) du Comité permanent en charge des Méthodes
d’analyse de la composition, sous la conduite de son chef de projet, M. Richard Johnson (NZ).

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ISO/DIS 9877:2025(fr)
PROJET de Norme internationale
FIL 258:2025(fr)
Lait et produits laitiers — Détermination des cendres
1 Domaine d’application
Le présent document spécifie une méthode pour la détermination de la teneur en cendres du lait, du lait
en poudre, du lactosérum en poudre, du concentré de protéines de lactosérum, des formules infantiles,
du perméat de lait en poudre et du concentré de protéines de lait.
NOTE Pour la détermination des cendres (« cendres fixes ») des caséines et des caséinates,
voir l'ISO 5544|FIL 89.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 3310-1, Tamis de contrôle — Exigences techniques et vérifications — Partie 1 : Tamis de contrôle en
tissus métalliques
ISO 707, Lait et produits laitiers — Lignes directrices pour l'échantillonnage
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions suivants s'appliquent.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes :
— ISO Online browsing platform : disponible à l’adresse https://www.iso.org/obp
— IEC Electropedia : disponible à l’adresse https://www.electropedia.org/
3.1
cendres
substances déterminées par la procédure décrite dans le présent document
Note 1 à l’article : Les cendres des produits laitiers sont traditionnellement exprimées en pourcentage de masse, ce
qui équivaut numériquement à des grammes pour 100 g de produit.
ISO/DIS 9877:2025(fr)
FIL 258:2025(fr)
4 Principe
Le résidu de cendres est déterminé, par différence de poids, en appliquant une procédure d'incinération,
à 550 °C ± 25 °C, à la prise d'essai.
5 Appareillage
Matériel courant d
...