Essential oils (containing tertiary alcohols) — Estimation of free alcohols content by determination of ester value after acetylation

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Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

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English, French

Published date

12-01-1976

Publisher

International Organization for Standardization

The estimation is carried out by acetylation of the essential oil by acetyl chloride and acetic anhydride, in the presence of dimethylaniline. The acetylated oil is isolated and dried and the ester value is determined. The free alcohols content is calculated taking into account the ester values of the same but non-acetylated essential oil. This method is applicable to essential oils containing an appreciable proportion of tertiary alcohols, namely of linalol and terpineol. It is not applicable to essential oils containing appreciable proportions of phenols, anthranilates, lactones and aldehydes.

DocumentType	Standard
Pages	2
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS ISO 3794:1976	Identical
GOST ISO 3794 : 2015	Identical
NEN ISO 3794 : 1978	Identical
BIS IS 326-9-2 : 2017	Identical
UNE 84166:1992	Identical

BS ISO 3761:2005	Oil of rosewood, Brazilian type [Aniba rosaeodora Ducke var. amazonica Ducke or Aniba parviflora (Meissner) Mez]
ISO 3761:2005	Oil of rosewood, Brazilian type (Aniba rosaeodora Ducke or Aniba parviflora (Meisn.) Mez.)
NF ISO 3761 : 2006	OIL OF ROSEWOOD, BRAZILIAN TYPE (ANIBA ROSAEODORA DUCKE OR ANIBA PARVIFLORA (MEISN.) MEZ.)
ISO 4725:2004	Oil of cedarwood, Texas (Juniperus mexicana Schiede)
NF ISO 4725 : 2004	OIL OF CEDARWOOD, TEXAS TYPE (JUNIPERUS MEXICANA SCHIEDE)
BS ISO 4725:2004	Oil of cedarwood, Texas (Juniperus mexicana Schiede)

ISO 1241:1996	Essential oils Determination of ester values, before and after acetylation, and evaluation of the contents of free and total alcohols
ISO 212:2007	Essential oils Sampling
ISO 709:2001	Essential oils Determination of ester value
ISO 356:1996	Essential oils Preparation of test samples

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ISO 3794:1976

Essential oils (containing tertiary alcohols) — Estimation of free alcohols content by determination of ester value after acetylation

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