GSO ISO 13909-7:2013
Hard coal and coke -- Mechanical sampling -- Part 7: Methods for determining the precision of sampling, sample preparation and testing

Standard No.

GSO ISO 13909-7:2013

Release Date

2013

Published By

GSO

Latest

GSO ISO 13909-7:2013

Scope

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.

GSO ISO 13909-7:2013 history

• 2013 GSO ISO 13909-7:2013 Hard coal and coke -- Mechanical sampling -- Part 7: Methods for determining the precision of sampling, sample preparation and testing