Norm

NEN-EN-ISO 12966-3:2010 en

Dierlijke en plantaardige vetten en oliën - Gaschromatografie van methylesters van vetzuren - Deel 3: Bereiding van methylesters met behulp van trimethylsufoniumhydroxide (TMSH)

  • Deze norm is ingetrokken sinds 16-06-2016

34,42

Over deze norm

Status Ingetrokken
Aantal pagina's 4
Commissie Plantaardige en dierlijke oliën en vetten
Gepubliceerd op 01-01-2010
Taal Engels
This part of ISO 12966 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 including milk fat and blends containing milk fat. 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). As CLA is not correctly analysed, this method is not applicable to the determination of the complete fatty acid composition of milk fat samples. 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.

Details

ICS-code 67.200.10
Nederlandse titel Dierlijke en plantaardige vetten en oliën - Gaschromatografie van methylesters van vetzuren - Deel 3: Bereiding van methylesters met behulp van trimethylsufoniumhydroxide (TMSH)
Engelse titel Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 3: Preparation of methyl esters using trimethylsulfonium hydroxide (TMSH)
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