Petroleum products and lubricants – Neutralization number - Potentiometric titration method
Title : BDS ISO 6619:2021
This International Standard specifies a method for the determination of acidic constituents in petroleum products and lubricants soluble or nearly soluble in mixtures of toluene and propan-2-01. It is applicable for the determination of acids whose dissociation constants in water are larger than 10Wg; extremely weak acids whose dissociation constants are smaller than 10mg do not interfere. Salts react if their hydrolysis constants are larger than 10Bg.