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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


CHUI, Queenie Siu Hang; IAMASHITA, Celia Omine  and  BISPO, João Marcos de Almeida. Homogeneity testing of a lot of silicon metal prepared as a reference material. Quím. Nova [online]. 2005, vol.28, n.3, pp.497-501. ISSN 1678-7064.

From the perspective of the uncertainties in chemical measurements all uncertainty sources should be part of the uncertainty of the reference material. When the primary methods are not available, interlaboratorial comparisons are used as a means of certification. The material to be distributed to the laboratories should have its homogeneity confirmed. The uncertainty due to this factor will be added to the characterization uncertainty. This work presents a homogeneity study of a lot of silicon metal of chemical degree where the uncertainty due to inhomogeneity is obtained using analysis of variance.

Keywords : uncertainty; homogeneity test; reference material.

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