Overview - EN ISO 12966-1:2014 (FAMEs, Gas Chromatography)
EN ISO 12966-1:2014 provides guidelines for the gas chromatographic (GC / GLC) determination of fatty acid methyl esters (FAMEs) formed from animal and vegetable fats and oils. It gives an overview of modern gas chromatography practice for qualitative and quantitative analysis of free and bound fatty acids after conversion to methyl esters. The standard covers typical FAME ranges (C4–C26), column choices (capillary columns ~10–100 m), and detector considerations for routine lipid profiling.
Key topics and requirements
- Scope & applicability: Applicable to crude, refined, partially and fully hydrogenated fats and oils. Not intended for dairy/ruminant fats, CLA‑supplemented products, or highly polymerized/oxidized fats.
- Principle: Conversion of glycerides and free fatty acids to FAMEs (see ISO 12966-2 and ISO 12966-3 for preparation methods), followed by separation by capillary GC and detection.
- Columns & separation: Guidance on stationary phases and capillary column lengths to separate complex mixtures, including mono- and polyunsaturated cis/trans isomers.
- Detectors & carrier gas:
- FID (flame ionization detector) is recommended for routine quantitative FAME analysis; hydrogen is advised as carrier gas for FID to achieve sharper peaks.
- MSD (mass selective detector) may be used for identification; helium is recommended as carrier gas for MSD applications.
- Preparation of FAMEs: Overview of esterification/transmethylation approaches and their limitations (short-chain FAMEs, artefacts, soap formation). Reference to ISO 12966-2 and ISO 12966-3 for detailed procedures.
- Evaluation: Calculation of peak areas and area percentages, use of internal standards and correction factors for quantitative results.
- Reporting: Required information for test reports and bibliographic references.
Practical applications
- Routine fatty acid profiling of edible oils, industrial fats, and oilseed products
- Authentication and quality control (composition checks, trans‑fat monitoring)
- Research and product development in food science, nutrition and petrochemical/fatty compound analysis
- Regulatory compliance testing and laboratory accreditation work
Who should use this standard
- Analytical and quality control laboratories performing lipid analysis
- Food manufacturers, oilseed processors and refiners
- Regulatory bodies and conformity assessment organizations
- Instrument manufacturers and method developers implementing GC methods for FAMEs
Related standards
- ISO 12966-2: Preparation of methyl esters of fatty acids
- ISO 12966-3: Preparation using trimethylsulfonium hydroxide (TMSH)
- ISO 12966-4: Capillary gas chromatographic method
Keywords: EN ISO 12966-1:2014, gas chromatography, fatty acid methyl esters, FAMEs, animal and vegetable fats and oils, GLC, FID, capillary GC.
