ISO 3086:2006 PDF

Scope: This International Standard specifies experimental methods for checking the bias of sampling of iron ores, when sampling is carried out in accordance with the methods specified in ISO 3082, having as reference a stopped-belt sampling method. It is recommended that an inspection of the mechanical sampling system be carried out before conducting bias testing. Sampling systems not completely in accordance with 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 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. NOTE 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; b) for checking the bias of size distribution of iron ores by sieving, having as reference the hand sieving methods according to ISO 4701; c) 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 3086:2006 Referenced Document

ISO 11323:2002 Iron ore and direct reduced iron - Vocabulary
ISO 3082:2000 Iron ores - Sampling and sample preparation procedures
ISO 3085:2002 Iron ores - Experimental methods for checking the precision of sampling, sample preparation and measurement

2006 ISO 3086:2006 Iron ores - Experimental methods for checking the bias of sampling
1998 ISO 3086:1998 Iron ores - Experimental methods for checking the bias of sampling
1986 ISO 3086:1986 Iron ores; Experimental methods for checking the bias of sampling
1974 ISO 3086:1974 Iron ores — Experimental methods for checking the bias of sampling