Reference number
ISO 4096:1978
ISO 4096:1978
© ISO 2024
ISO 4096:1978
Essential oils (containing tertiary alcohols) — Evaluation of free alcohols content by determination of ester value after cold formylation
Edition 1
1978-10
1978-10
Withdrawn
Abstract
The essential oil is subjected to cold formylation by a mixture of formic acid and acetic anhydride. After formylation the ester value is determined. The free alcohols content is calculated taking into account the ester values of the same oil before formylation. Total alcohols and combined alcohols content can also be determined with this method.