Numéro de référence
ISO 3793:1976
ISO 3793:1976
© ISO 2024
ISO 3793:1976
Huiles essentielles — Évaluation de la teneur en alcools libres primaires et secondaires par acétylation pyridinée
Edition 1
1976-08
1976-08
Annulée
Résumé
The method consists in acetylating the hydroxyl groups containing compounds with a mixture of acetic anhydride and pyridine. The excess of acetic anhydride is hydrolized and the acetic acid formed is titrated with a potassium hydroxide solution. Primary and secondary alcoholes are acetylated completely by this method. Phenols, anthranilates and aldehydes are acetylated either completely or partially. Tertiary alcohols are acetylated only in a negligible extent.
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