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Química Nova

Print version ISSN 0100-4042

Abstract

BAZILIO, Fabio Silvestre; BOMFIM, Marcus Vinícius Justo; ALMEIDA, Rodrigo Justo de  and  ABRANTES, Shirley de Mello Pereira. Estimation of measurement uncertainty: a case study of the migration test of ε-caprolactam with determination by GC-FID. Quím. Nova [online]. 2012, vol.35, n.8, pp. 1664-1667. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422012000800028.

The estimation of measurement uncertainty of an analytical result is an important tool to be applied for compliance to ISO IEC 17025. Through the available guides it is possible to establish procedures and criteria for the estimation of measurement uncertainty. This paper presents a case study on the estimation of measurement uncertainty in migration the test of ε-caprolactam from the polyamide 6 packages to fatty foods with determination by GC-FID. The calculation methodology used for the estimation of measurement uncertainty for the migration test was developed based on the guides EURACHEM / CITAC and ISO GUM, taking into account relevant aspects of the migration test. The expanded uncertainty estimated was approximately 23% of the concentration of migration.

Keywords : measurement uncertainty; migration analysis; gas chromatography.

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