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Normas DIN – AENOR
DIN EN ISO 12966-3:2016-11

DIN EN ISO 12966-3:2016-11

Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 3: Preparation of methyl esters using trimethylsulfonium hydroxide (TMSH) (ISO 12966-3:2016); German version EN ISO 12966-3:2016

Corps gras d'origines animale et végétale - Chromatographie en phase gazeuse des esters méthyliques d'acides gras - Partie 3: Préparation des esters méthyliques à l'aide d'hydroxyde de triméthylsulfonium (TMSH) (ISO 12966-3:2016); Version allemande EN ISO 12966-3:2016

Tierische und pflanzliche Fette und Öle - Gaschromatographie von Fettsäuremethylestern - Teil 3: Herstellung von Methylestern mittels Trimethylsulfoniumhydroxid (TMSH) (ISO 12966-3:2016); Deutsche Fassung EN ISO 12966-3:2016

Fecha:
2016-11 /Active
Equivalencias internacionales:

BVL L 13.00-27/3 (2018-06)

EN ISO 12966-3 (2016-06)

ISO 12966-3 (2016-05)

Relación con otras normas DIN:
Resumen:
This Standard specifies a rapid base-catalysed transesterification method for fats and oils with trimethylsulfonium hydroxide (TMSH) to prepare fatty acid methyl esters. The method is exclusively applicable to the preparation of methyl esters of fats and oils for gas liquid chromatographic (GLC) analysis. It is applicable to all fats and oils, but excluding those coming from milk and milk products. Isomerization of unsaturated fatty acids only occurs to a minor extent and isomerized fatty acids are only present at the determination limit. As isomerization takes place, the procedure is not recommended for conjugated linoleic acid (CLA). Only about 70 % to 80 % of the free fatty acids are esterified. In the case of conjugated cyclopropyl and cyclopropenyl fatty acids, side reactions may occur, but these do not interfere with the determination of the fatty acids.
Keywords:
Agricultural products, Animal, Animal fats, Animal oils, Chemical analysis and testing, Esterification, Esters, Fats, Fatty acid methyl esters, Fatty acids, Food products, Gas chromatography, Laboratory sample, Measurement, Measuring instruments, Measuring techniques, Methods of manufacture, Methyl esters, Oils, Production, Samples, Sampling methods, Specimen preparation, Test performance, Test reports, Testing, Testing devices, Vegetable, Vegetable fats, Vegetable oils
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