ISO 12966-2-2017 PDF

Full title and description

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). This International Standard specifies validated procedures for converting fats, oils, fatty acids and soaps into their fatty acid methyl esters (FAMEs) for subsequent analytical techniques such as gas chromatography (GC/GLC), thin-layer chromatography (TLC) and infrared spectrometry (IR). Milk and milk products are excluded from this edition.

Abstract

ISO 12966-2:2017 defines four methylation/transmethylation procedures (a rapid alkaline transmethylation, a sequential general alkaline/acid method, a boron trifluoride (BF3) catalysed method, and an acid-catalysed glyceride transmethylation) and the associated reagents, apparatus and procedural steps needed to produce FAMEs suitable for chromatographic and spectrometric analysis. The document provides applicability notes and a thin-layer chromatography check for completeness of derivatization. Milk fats are explicitly excluded from the scope.

General information

• Status: Published.
• Publication date: March 2017 (publication implemented/listed by national bodies in mid‑2017; ISO bibliographic record shows 2017-03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 67.200.10 (Animal and vegetable fats and oils).
• Edition / version: Edition 2 (2017).
• Number of pages: 15 pages (ISO bibliographic record).

Scope

The standard specifies methods for preparing methyl esters of fatty acids from a wide range of animal and vegetable fats and oils, fatty acids and soaps, so that the resulting FAMEs are suitable for GC/GLC, TLC and IR analysis. It covers four different derivatization routes to accommodate different sample types and analytical needs, and it excludes milk and milk‑derived fats. The standard also describes reagents, apparatus, sample preparation and checks for completeness of reaction.

Key topics and requirements

• Specification of four validated methylation/transmethylation routes: rapid alkaline transmethylation, general sequential alkaline/acid procedure, BF3-catalysed transmethylation, and acid-catalysed transmethylation of glycerides.
• Detailed lists of reagents and apparatus required for each method (including safety and quality notes for catalysts such as BF3).
• Procedural steps for sample preparation, reaction conditions, phase separation and extract cleanup to obtain FAMEs suitable for downstream analysis.
• Applicability guidance: which methods suit routine analyses, short‑chain fatty acids, distillates/acid oils and other sample types; and explicit exclusion of milk fats.
• Annex with an informative thin‑layer chromatography method to test completeness of derivatization.

Typical use and users

Laboratories performing fatty acid profiling in the food, feed and edible‑oil industries, quality control and R&D laboratories in vegetable/animal oil processing, analytical services that provide GC/GC‑FID or GC‑MS fatty acid analysis, academic researchers in lipid chemistry, and regulatory laboratories that require standardized sample derivatization procedures for comparative testing. The standard is used as the reference procedure for preparing FAMEs prior to chromatographic determination of fatty acid composition.

Related standards

ISO 12966 is a multipart series. Relevant related documents include ISO 12966-1 (general principles and definitions for GC of FAMEs), ISO 12966-3 (preparation of methyl esters using trimethylsulfonium hydroxide, updated 2016), ISO 12966-4 (determination by capillary gas chromatography) and national/adopted EN versions. ISO 661 (preparation of test sample) is cited as a normative reference for sample handling.

Keywords

Fatty acid methyl esters (FAME), methylation, transmethylation, gas chromatography, GC, gas‑liquid chromatography, fats and oils, sample preparation, BF3, alkaline transmethylation, acid transmethylation, lipid analysis.

FAQ

Q: What is this standard?

A: ISO 12966-2:2017 is Part 2 of the ISO 12966 series and specifies methods to prepare fatty acid methyl esters (FAMEs) from animal and vegetable fats and oils for analytical purposes.

Q: What does it cover?

A: It covers four validated methylation/transmethylation procedures (rapid alkaline, general sequential alkaline/acid, BF3‑catalysed, and acid‑catalysed glyceride transmethylation), including reagents, apparatus, procedures and a TLC check for completeness; milk and milk products are excluded.

Q: Who typically uses it?

A: Analytical and quality control laboratories in the food, edible‑oil and feed sectors, regulatory and research laboratories, and instrument labs that perform GC/GC‑FID or GC‑MS fatty acid profiling.

Q: Is it current or superseded?

A: ISO 12966-2:2017 (Edition 2, 2017) replaced ISO 12966-2:2011. The ISO bibliographic record lists the 2017 edition as published and currently confirmed; users should check their national standards body for any subsequent reviews or amendments.

Q: Is it part of a series?

A: Yes — it is part of the ISO 12966 series on gas chromatography of fatty acid methyl esters (other parts include ISO 12966-1, -3, -4, etc.).

Q: What are the key keywords?

A: FAME, methylation, transmethylation, gas chromatography, fats and oils, BF3, alkaline transmethylation, acid transmethylation, lipid analysis.