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)

Datum objavljivanja: 12. 5. 2016.

Опште информације

Trenutna faza: 90.93 Effective date: 8. 12. 2021.

Inicijator: ISO

Pripada: ISO/TC 34/SC 11

Vrsta: Međunarodni standard

ICS: 67.200.10

Jezik: engleski francuski

Kupovina

Status: Objavljen

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Apstrakt

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.

Životni ciklus

PRETHODNO

POVUČEN
ISO 12966-3:2009

TRENUTNO

OBJAVLJEN
ISO 12966-3:2016
90.93 Odluka o potvrđivanju standarda
8. 12. 2021.

Nacionalna preuzimanja

SRPS EN ISO 12966-3:2017

ISS

Ulja i masti biljnog i životinjskog porekla – Gasna hromatografija metilestara masnih kiselina – Deo 3: Priprema metilestara korišćenjem trimetilsulfonijum-hidroksida (TMSH)

60.60 Standard objavljen

E034-2,11 Saznaj više