标准编号：ISO 13909-7:2016
中文名称：煤和焦炭 机械取样 第7部分：取样精确度,样品制备和试验测定方法
英文名称：Hard coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
发布日期：2016-07
标准范围
In this part of ISO 13909, 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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