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ISO/DIS 6139

Aluminium ores — Experimental determination of the heterogeneity of distribution of a lot

General information

40.20     Oct 6, 2026

ISO

ISO/TC 79/SC 12

International Standard

73.060.40  

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Scope

The heterogeneity of distribution is characterized by the distribution variance and is determined by experimentally measuring the sampling variance. Because both the composition variance and distribution variance contribute to the measured sampling variance, it is necessary to separate these two components. Two methods of data analysis are permitted: Visman's theory of sampling which uses classical statistics and the variogram method which gives a better estimate because of taking into account serial correlation between adjacent increments.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 6139:1993

NOW

PROJECT
ISO/DIS 6139
40.20 DIS ballot initiated: 12 weeks
Oct 6, 2026

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