ISO 1389-5:1977

Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method

The principle of the method consists in the potentiometric titration of a test portion not exceeding 10 g and containing not more than 0.150 g of phthalic acid, with a standard volumetric solution of triethylamine in anhydrous butanone. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

71.080.50

Statut:

Annulée

Date de Publication:

1977-01-31

Numéro Standard:

ISO 1389-5:1977