ISO/TC 54 Ätherische Öle,
ISO/TC 54 Essential oils,
ISO/TC 54 Huiles essentielles,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
ISO 1271
: Essential oils; Determination of carbonyl value; Free hydroxylamine method
- [1983-12-00]
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Medientyp:
Norm
Titel:
ISO 1271
:
Essential oils; Determination of carbonyl value; Free hydroxylamine method
Weitere Titel:
Früher unter dem Titel: ISO 1271 (1972-05)
Ätherische Öle; Bestimmung der Carbonylzahl; Methode mit freiem Hydroxylamin
Huiles essentielles; Détermination de l'indice de carbonyle; Méthode à l'hydroxylamine libre
Anmerkungen:
Internationale Übereinstimmung mit: BS ISO 1271 (2001-08-15), IDT*GB/T 14454.13 (2008), MOD*NF T75-125 (1984-02-01), IDT*UNE 84162 (1992-11-10), IDT*KS H ISO 1271 (2014-12-29), IDT*GOST ISO 1271 (2014), IDT*TS 5820 (1988-04-29), IDT
Beschreibung:
The determination is carried out by converting the carbonyl compounds to oximes by reaction with free hydroxylamine liberated in a mixture of hydroxylammoniumchloride and potassium hydroxide. The excess alkali is titrated with hydrochloric acid solution, either colorimetrically or potentiometrically. The method is applicable to essential oils which contain carbonyl compounds (especially ketones, excluding methylketones) which are difficult to convert to oximes by the method specified in ISO 1279. The method is not applicable to essential oils which contain substantial amounts of esters of other alkali-sensitive constituents.