ISO 13909-7:2025
ISO 13909-7:2025 Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
CDN $337.00
This publication was last reviewed and confirmed in 2025.
Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
Description
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.
Edition
3
Published Date
2026-06-18
Status
PUBLISHED
Pages
42
Language
English
Format
Secure PDF
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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.
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