ISO 4096:1978
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Essential oils (containing tertiary alcohols) — Evaluation of free alcohols content by determination of ester value after cold formylation
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
03-04-2019
English, French
01-10-1978
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.
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