ISO 13909-7:2016Withdrawn

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

Houille et coke — Échantillonnage mécanique — Partie 7: Méthodes pour la détermination de la fidélité de l'échantillonnage, de la préparation de l'échantillon et de l'essai

This edition has been replaced by ISO 13909-7:2025.

Abstract / scope

In ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described 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.

Life cycle

Replaces

ISO 13909-7:2001WithdrawnHard coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testingInternational Standard · Published 20 Dec 2001 · ISO/TC 27/SC 4

Replaced by

ISO 13909-7:2025PublishedCoal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testingInternational Standard · Published 22 Jul 2025 · ISO/TC 27/SC 4