Metrohm is pleased to announce that the ASTM has published method D8045 for the determination of Acid Number (AN) in crude oil and petroleum products. The new method describes thermometric titration and was developed by Metrohm together with industry leaders using the 859 Titrotherm titrator. Method D8045 demonstrates the superiority of thermometric titration for complex petroleum samples, as it provides for better reproducibility of results, is significantly faster, and consumes less reagent than the commonly used method D664.
Thermometric titration uses a highly sensitive, fast responding temperature sensor that detects the reaction endpoint based on the enthalpy change in the solution.