The ASTM has released a new method for Acid Number (AN) determination in crude oil and petroleum products by thermometric titration.
Compared with potentiometric titration (ASTM D664), this method is more robust, faster, and simpler.
Above all, this method will save you money, as you will need less solvent per analysis.
Why go with thermometric titration?
Oil matrix does not interfere with the measurement.
Analysis in one third of the time (compared with potentiometric titration).
Sensor requires no maintenance or conditioning.
Less solvent and reagent per analysis.