Certified reference material to water content determination in bioethanol fuel

摘要

Bioethanol is a strategic biofuel in Brazil. Thus, a strong metrological basis for its measurements is required to ensure the quality and promote its exportation. Recently, Inmetro certified a reference material for water content in bioethanol. This paper presents the results of these studies. The characterization, homogeneity, short-term stability and long-term stability uncertainty contributions values were 0.00500, 0.0166, 0.0355 and 0.0391 mg g ~(-1), respectively. The certificated value for water content of bioethanol fuel was(3.65 ± 0.11)mg g ~(-1). This CRM is the first and up to now the unique in the world.