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Petroleum products -- Determination of saponification number -- Part 2: Potentiometric titration method
This part of ISO 6293 specifies a method for the determination, by potentiometric titration, of the amount of constituents in petroleum products that will saponify under the conditions of the test. ISO 6293-1 specifies a determination by colour indicator titration.
The method is applicable to materials having saponification numbers in the range 2 mg KOH/g to 200 mg KOH/g.
Compounds of sulfur, phosphorus, halogens and some other compounds react with the alkali and acids under the test conditions.
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