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Homepage>ISO Standards>ISO 13909-7:2016-Hard coal and coke — Mechanical sampling-Part 7: Methods for determining the precision of sampling, sample preparation and testing
download between 0-24 hoursReleased: 2016
ISO 13909-7:2016-Hard coal and coke — Mechanical sampling-Part 7: Methods for determining the precision of sampling, sample preparation and testing

ISO 13909-7:2016

ISO 13909-7:2016-Hard coal and coke — Mechanical sampling-Part 7: Methods for determining the precision of sampling, sample preparation and testing

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Standard´s number:ISO 13909-7:2016
Pages:43
Edition:2
Released:2016
Language:English
DESCRIPTION

ISO 13909-7:2016


In ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described 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.
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