title: A measure for assessing certified reference ores and related materials.
abstract: Experience in the certification of a number of Canadian reference ores and related materials has shown that their quality or usefulness in particular analytical applications can be evaluated objectively in terms of a so-called certification factor. This factor is defined as the ratio of the relative confidence interval of the interlaboratory consensus value for a selected element, expressed as a percentage, to the mean of the within-laboratory coefficient of variation. It is proposed that for a material to be acceptable (certifiable), its certification factor(s) must be 4.
authors.affiliation: Mineral Sciences Laboratories, Canada Centre for Mineral and Energy Technology, Department of Energy, Mines and Resources, Ottawa, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Sutarno
authors.forename: G H
authors.initials: GH
authors.lastname: Faye