ISO 13909-7:2025
Coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2025 |
| No. of Pages | 42 |
| ICS Classification | 73.040 Coals 75.160.10 Solid fuels |
| Committee | ISO/TC 27/SC 4 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO : 0 |