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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
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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

PUBLISH DATE 2025
ISO 13909-7:2025

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.

SDO ISO: International Organization for Standardization
Document Number ISO 13909
Publication Date Jan. 1, 2025
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 27/SC 4
Publish Date Document Id Type View
Jan. 1, 2025 ISO 13909-7:2025 Revision
July 1, 2016 ISO 13909-7:2016 Revision