AS 2862.3-1999

1 - AS 2862.3-1999 COPPER, LEAD AND ZINC SULFIDE CONCENTRATES-SAMPLING - EXPERIMENTAL METHODS FOR CHECKING THE BIAS OF SAMPLING
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
7 - 3 General requirements and recommendations
8 - 4 Sampling and sample processing methods
8 - 4.1 Sampling
8 - 4.1.1 General
8 - 4.1.2 Checking bias in mechanical sampling
9 - 4.1.3 Checking bias between sampling at different locations
9 - 4.2 Sample processing
9 - 5 Analysis of experimental data
9 - 5.1 Statistical basis
10 - 5.2 Determination of the mean difference and its standard deviation
10 - 5.3 Determination of the required number of data sets
12 - 5.4 Statistical test
13 - Annex A - Numerical examples of determining the bias of sampling
13 - A.1 Example 1
14 - A.2 Example 2
17 - Annex B - Bibliography

Sets out methods for checking whether there is bias in the sampling of sulfide concentrates. Numerical examples are provided. This Standard is identical with and has been reproduced from ISO 13292:1997.

This International Standard specifies methods for checking whether there is any bias in the sampling of copper, lead and zinc sulfide concentrates, where the sampling is carried out in accordance with the methods specified in ISO 12743. These methods can also be used for checking whether there is any bias in sample processing and for checking possible significant differences in the analyses of exchange samples and lot samples taken at different places, e.g. at loading and discharge points. Numerical examples are given in annex A.

First published as AS 2862.3-1986.
Second edition 1999.