Caracterização detalhada de material de referência certificado de carvão brasileiro

• Main Authors: Vera L. V. Fallavena, Cristiane S. de Abreu, Taísi D. Inácio, Marçal Pires, Carla M. N. Azevedo, Iolanda D. Fernandes, Lizete S. Ferret, M. Rosa Martinez Tarazona
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2013-01-01
• Series: Química Nova
• Subjects: coal characterization; reference certified material; analytical quality
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000600020&lng=en&tlng=en

The use and characterization of the first Certified Reference Material (CRM) of Brazilian coal for analytical quality control are presented. All results were determined within the limits of repeatability and reproducibility allowed under the standards. Notable among the characterization parameters was the mineral matter content (45.39%) obtained by an alternative procedure showing a low relative error (-2.1%) compared to the standard technique (low ashing temperature). The possible expanded application of this CRM application in national laboratories, beyond the certificated and reference parameters, has advantages such as lower cost and easy availability, but round robin tests must be performed.