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ISO 13909-7:2025

Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing

Publication date:   Jul 22, 2025

General information

60.60   Standard published   Jul 22, 2025

ISO

ISO/TC 27/SC 4 Sampling

International Standard

73.040   Coals | 75.160.10   Solid fuels

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Scope

This document defines methods for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.
In this document, formulae are developed which link the variables that contribute to overall sampling precision.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 13909-7:2016

NOW

PUBLISHED
ISO 13909-7:2025
60.60 Standard published
Jul 22, 2025