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EVS-EN ISO 12966-3:2016

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)

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Kehtiv alates 05.07.2016
Alusdokumendid
ISO 12966-3:2016; EN ISO 12966-3:2016
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Standardi ajalugu
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Kuupäev
Tüüp
Nimetus
05.07.2016
Põhitekst
04.03.2010
Põhitekst
ISO 12966-3:2016 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.
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EVS-EN ISO 16720:2007

Mulla kvaliteet. Proovide eeltöötlemine neid enne analüüsimist külmkuivatades
Uusim versioon Kehtiv alates 06.06.2007
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EVS-EN ISO 12966-4:2015

Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 4: Determination by capillary gas chromatography (ISO 12966-4:2015)
Uusim versioon Kehtiv alates 02.07.2015
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EVS-EN ISO 12966-2:2017

Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 2: Preparation of methyl esters of fatty acids (ISO 12966-2:2017)
Uusim versioon Kehtiv alates 16.05.2017