ISO 13909-7-2001 硬煤和焦炭 机械化采样 第7部分：采样精度测定方法，样品制备方法及试验方法

标准号：ISO 13909-7-2001
中文标准名称：硬煤和焦炭 机械化采样 第7部分：采样精度测定方法，样品制备方法及试验方法
英文标准名称：Hard coal and coke - Mechanical sampling - Part 7: Methods for determining the precision of sampling, sample preparation and testing
标准类型：D21
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：D21
国际标准分类号：73.040;75.160.10
适用范围：In this part of ISO 13909, equations are developed which link the variables which 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.