Estimativa da incerteza de medição em análise cromatográfica: abordagem sobre a quantificação de carbamato de etila em cachaça

• Autor(a) principal: Cruz, Marcus Henrique Campino de la
• Data de Publicação: 2010
• Outros Autores: Caixeiro, Janaína Marques Rodrigues, Couto, Paulo Roberto Guimarães, Cunha, Valnei Smarçaro da, Bremser, Wolfram
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional do INMETRO
• Texto Completo: http://hdl.handle.net/10926/796

The measurement uncertainty is useful to estimate the confidence of analytical results. Nowadays, a result without the uncertainty statement cannot be considered reliable, but the scientific literature still lacks examples of the estimate of the measurement uncertainty. This paper presents a practical and reliable description of the measurement uncertainty estimation of the analytical determination of ethyl carbamate in cachaça by GC-IDMS. The isotope dilution technique (ID) associated with GC-MS was used to improve the accuracy. The ncertainty estimated corresponds to 10% of the mass fraction of ethyl carbamate (115 ± 11) ng/g, which is in agreement with ppb level.