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BS ISO 1279:1996

Current

Current

The latest, up-to-date edition.

Essential oils. Determination of carbonyl value. Potentiometric methods using hydroxylammonium chloride

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-09-2001

€130.88
Excluding VAT

Committee
W/-
DevelopmentNote
Reviewed and Confirmed by BSI, May 2007. (04/2007)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Current

This International Standard specifies two methods for the potentiometric determination of the carbonyl value of essential oils which contain carbonyl compounds, either aldehydes or ketones.

Method I (see clause5), is based on a cold oximation reaction with hydroxylammonium chloride. It applies to essential oils whose main constituents are easily oximable aldehydes and ketones, with the exception of citronellal which needs a low temperature to avoid cyclization phenomena and acetalization.

NOTE1 In the case of citronellal the free hydroxylamine method described in ISO1271 should be used.

NOTE2 Examples of essential oils concerned are lemongrass, hesperydus and rue.

Method II (see clause6), is based on a hot oximation reaction with hydroxylammonium chloride. It applies to essential oils whose main constituents are ketones which are in general oximable only with difficulty.

NOTE3 Examples of essential oils concerned are vetiver, Dalmation sage and white artemisia which contain methylketones oximable only with difficulty.

The International Standard for a specific essential oil will specify the method to be used, whether this is the free hydroxylamine method described in ISO1271 or another method.

Standards Relationship
ISO 1279:1996 Identical

ISO 1271:1983 Essential oils Determination of carbonyl value Free hydroxylamine method
ISO 212:2007 Essential oils Sampling
ISO 356:1996 Essential oils Preparation of test samples

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