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

• Main Author: Gonçalves,Mary A.
• Publication Date: 2013
• Other Authors: Gonzaga,Fabiano B., Fraga,Isabel C. S., Ribeiro,Carla M., Sobral,Sidney P., Rego,Eliane C. P., Santana,Elaine B., Oliveira,Leonardo M., Silva,Viviane F., Leal,Rodrigo V. P., Santo Filho,Dalni M. E., Siqueira,José R. R., Barbosa,Thales P., Rodrigues,Janaína M., Cunha,Valnei S., Skrobot,Vinícius L., Costa,Cristiane B., Pessoa Júnior,Aderson R., Carneiro,Helena S. P., Colares,Helenice, Caliman,Ednéia, Alves,Márcia V. S.
• Format: Article
• Language: por
• Source: Química Nova (Online)
• Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000300008
• topic: proficiency testing; biofuels quality parameters; certified reference values

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).