FIRST ROUND OF THE PROFICIENCY TEST SCHEME ON BRAZILIAN CACHAÇA |
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Akie K. Ávila, Renata M. H. Borges, Thiago de O. Araujo, Maria Cristina B. Quaresma, Fabio S. Bazilio, Lígia C. C. Oliveira |
- Abstract:
- Cachaça is the Brazilian most popular spirit and the quality of analytical results is essential for protection of consumers and to expand the international acceptance of the product. The first round of the proficiency-testing scheme (interlaboratory study), Brazilian cachaça, was carried out between November 2004 and March 2005. The blended sample was prepared for this round containing several components, including copper, methanol and ethyl carbamate. The aim of this paper is to evaluate the laboratory performance on the determination of the copper concentration in Brazilian cachaça. Eleven laboratories reported results for copper; these results were compared to the reference value attributed by Inmetro in partnership with The Laboratory of the Government Chemist – LGC from the United Kingdom and with the consensus value. A comparison between these values was made to determine which approach could guarantee better reliability to the conclusions taken from the PT scheme. The samples used have shown good homogeneity and stability, the reference value attributed by Inmetro and LGC is SI traceable and showed to be more appropriate to be used as the conventional true value than the consensus value calculated with the participants’ results.
- Keywords:
- Cachaça, Proficiency Test Scheme, copper
- Download:
- PWC-2006-TC7-027u.pdf
- DOI:
- -
- Event details
- Event name:
- XVIII IMEKO World Congress
- Title:
Metrology for a Sustainable Development
- Place:
- Rio de Janeiro, BRAZIL
- Time:
- 17 September 2006 - 22 September 2006