Teste de Proficiência Interlaboratorial: - Esquema Oils and Fuels OIL; - Amostra 04: Óleo Cru - Petróleo Bruto; - Amostra fornecida: 2x1000ml de amostra de óleo; - Principais Analítos: Acid Number ? Total (potentiometric); Asphaltenes; Density; Relative Density; API Gravity; Vanadium; Nickel; Iron; Micro Carbon Residue; Total Nitrogen; Pour Point; Reid Vapor Pressure; Salt; Sediment; Sulfur; Viscosity Kinematic 40°C; Water; High Temperature Simulated Distillation (HTSD) .