ISO 13909-7:2025-ed.3.0

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

STANDARD published on 22.7.2025

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The information about the standard:

Designation standards: ISO 13909-7:2025-ed.3.0
Publication date standards: 22.7.2025
The number of pages: 42
Approximate weight : 126 g (0.28 lbs)
Country: International technical standard
Category: Technical standards ISO

Annotation of standard text ISO 13909-7:2025-ed.3.0 :

Description / Abstract: 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.