ISO 1171:2024

International
Standard
ISO 1171
Fifth edition
Coal and coke — Determination of ash
2024-06
Charbon et coke — Détermination des cendres
Reference number
© ISO 2024
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Published in Switzerland
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Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Preparation of test sample . 2
7 Procedure . 2
7.1 General .2
7.2 Ash determination.2
8 Expression of results . 2
9 Precision . 3
9.1 Repeatability limit .3
9.2 Reproducibility limit .3
10 Test report . 3
Bibliography . 4

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Foreword
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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
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This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5, Methods
of analysis.
This fifth edition cancels and replaces the fourth edition (ISO 1171:2010), which has been technically
revised.
The main changes are as follows:
— title and references changed to be consistent with the new name of ISO/TC 27
— editorial updates to be in line with ISO 80000-1
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.

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ISO 1171:2
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