Química Nova (Jan 2013)

Avaliação de laboratórios brasileiros na determinação de alguns parâmetros de qualidade de biocombustíveis

  • Mary A. Gonçalves,
  • Fabiano B. Gonzaga,
  • Isabel C. S. Fraga,
  • Carla M. Ribeiro,
  • Sidney P. Sobral,
  • Eliane C. P. Rego,
  • Elaine B. Santana,
  • Leonardo M. Oliveira,
  • Viviane F. Silva,
  • Rodrigo V. P. Leal,
  • Dalni M. E. Santo Filho,
  • José R. R. Siqueira,
  • Thales P. Barbosa,
  • Janaína M. Rodrigues,
  • Valnei S. Cunha,
  • Vinícius L. Skrobot,
  • Cristiane B. Costa,
  • Aderson R. Pessoa Júnior,
  • Helena S. P. Carneiro,
  • Helenice Colares,
  • Ednéia Caliman,
  • Márcia V. S. Alves

DOI
https://doi.org/10.1590/s0100-40422013000300008
Journal volume & issue
Vol. 36, no. 3
pp. 393 – 399

Abstract

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This work shows the results of a Proficiency Testing performed by a partnership between INMETRO and ANP. The performance of 49 Brazilian laboratories (using the z-score statistical test) in determining 10 quality parameters of ethanol fuel and biodiesel was evaluated. The certified reference values were provided by INMETRO, allowing a more rigorous assessment of the laboratories. For hydrous ethanol, the acidity parameter showed the lowest number of laboratories with satisfactory results (48%), while 85% of the laboratories presented satisfactory results for ethanol content. For biodiesel, the percentage of laboratories with satisfactory results ranged from 46% (kinematic viscosity) to 92% (acid number).

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