БДС 1752:2022

Petroleum products. Determination of acidity and acid number

Scope

This document describes the procedure for determination of the acidity of petrol, kerosene, gas oils for industrial and municipal purposes, diesel fuels and the acid number of non-inhibited oils soluble in a mixture of ethanol and toluene or xylene.
Two methods are described:
Method A: Determination of acidity and acid number by titration with a solution of potassium hydroxide in ethanol.
Method B: Determination of the acid number by titration with a solution of potassium hydroxide in propan-2-ol in an atmosphere free of carbon dioxide.
Methods for determination of acid number can also be used for inhibited oils, if it is indicated in the product specification.