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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
Part 7: Methods for determining the precision of sampling, sample preparation and testing
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Summary
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.
Notes
60.60 : Norme internationale publiée
Technical characteristics
| Publisher | International Organization for Standardization (ISO) |
| Publication Date | 07/22/2025 |
| Edition | 3 |
| Page Count | 42 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
Replaces
23/06/2016
Superseded
, Reaffirmed
, Under review
Historical
Previous versions
23/06/2016
Superseded
, Reaffirmed
, Under review
Historical