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ISO 731-2:1977Withdrawn

Formic acid for industrial use — Methods of test — Part 2: Determination of total acidity — Titrimetric method

Acide formique à usage industriel — Méthodes d'essai — Partie 2: Détermination de l'acidité totale — Méthode titrimétrique

Abstract / scope

The principle consists in a titration of a test portion with a standard volumetric sodium hydroxide solution, using phenolphthalein as indicator. ISO/R 731 has been subdivised into seven parts. ISO 731/2 replaces clause 3 of ISO Recommendation R 731-1968.