This International Standard specifies experimental methods for checking the bias of the sampling of iron ores, when the sampling is carried out in accordance with the methods specified in ISO 3081 or ISO 3082, having as reference a stopped-belt sampling method according to ISO 3081.
NOTES
1 Sampling systems not completely in accordance with ISO 3081 or ISO 3082 are not always expected to be biased. Therefore bias checking may be done when there is some disagreement about the importance of some departure from the conditions of ISO 3081 and ISO 3082. If one party argues that the bias is likely to be substantial under some particular set of conditions then bias testing should mostly be done when those conditions apply.
2 The method for analysis of experimental data described here may also be applied:
a) for checking the bias of sample preparation of iron ores, having as reference the methods for sampling preparation according to ISO 3082 and ISO 3083;
b) for checking a possibly significant difference in the results obtained from the samples of one lot collected at different places, for example, a loading point and unloading point.
ISO 3086:1998 history
2006ISO 3086:2006 Iron ores - Experimental methods for checking the bias of sampling
1998ISO 3086:1998 Iron ores - Experimental methods for checking the bias of sampling
1986ISO 3086:1986 Iron ores; Experimental methods for checking the bias of sampling
1974ISO 3086:1974 Iron ores — Experimental methods for checking the bias of sampling