Name: EN ISO 12966-4:2026 — Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 4: Determination by capillary gas chromatography (ISO 12966-4:2026)
SKU: EN ISO 12966-4:2026
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Overview

EN ISO 12966-4:2026 – "Animal and vegetable fats and oils - Gas chromatography of fatty acid methyl esters - Part 4: Determination by capillary gas chromatography" – is a key international standard developed by CEN and ISO. It establishes a standardized method for determining fatty acid methyl esters (FAMEs), ranging from C4 to C24, in animal and vegetable fats, oils, and fatty acids using capillary gas chromatography (GLC). This standard ensures reliable separation and quantification of saturated, monounsaturated (cis- and trans-), and polyunsaturated (cis- and trans-) FAMEs in several types of fats and oils except those from milk, milk products, or those supplemented with conjugated linoleic acid (CLA).

The method is intended for use on crude, refined, partially hydrogenated, or fully hydrogenated fats and oils, as well as fats extracted from food products, supporting the analytical needs of food scientists, nutritionists, industry quality control, and regulatory bodies.

Key Topics

Scope and Applicability
- Covers the determination of FAMEs derived from transesterification or esterification of fats, oils, and fatty acids.
- Applicable to edible and technical animal and vegetable fats and oils, excluding those from milk or with CLA supplementation.
- Not designed for di-, tri-, polymerized, hydroxylated, or oxidized fatty acids and oils.
Principle of Capillary Gas Chromatography
- Utilizes highly polar stationary-phase columns to separate FAMEs based on chain length, saturation, and double-bond geometry.
- Identification achieved by matching retention times against pure reference standards.
- Quantification is performed using internal standards and instrument correction factors.
Reagents and Equipment
- Specifies the use of reference FAME standards, certified reference materials, and internal standards (e.g., C19:0, C21:0, C23:0) for accuracy.
- Details on necessary solvents (iso-octane, methyl tert-butyl ether, n-hexane/heptane), and the use of high-purity carrier gases.
- Recommends a 100 m capillary column with specified stationary phase for optimal FAME separation.
Calibration and Quality Assurance
- Details the preparation and use of calibration and reference standards to ensure quantifiable, reproducible results.
- Emphasizes methods for checking instrument performance and data reliability.
Results and Reporting
- Results can be reported by mass (g/100 g) or area percentage.
- Special provisions for quantifying short-chain and trans fatty acids.
- Guidance for data expression to support food labeling.

Applications

EN ISO 12966-4:2026 is an essential tool with wide practical applications:

Food Industry and Safety
- Enables precise determination of fatty acid composition in oils and fats, supporting accurate food labeling and nutritional claims.
- Facilitates quality assurance in food manufacturing and processing, ensuring compliance with regulatory standards.
Research and Product Development
- Supports R&D in developing healthier edible oils and tailoring fatty acid profiles for specific dietary needs or product requirements.
- Useful in authenticity testing and detecting adulteration of food fats and oils.
Regulatory and Quality Control
- Standard method adopted in routine laboratory analysis for monitoring compliance with food laws concerning fats and oils.
- Recommended for accredited laboratories as part of ISO/IEC 17025 conformity.
Industrial Uses
- Applied in technical applications requiring controlled fatty acid distribution, such as cosmetics, pharmaceuticals, and biofuels (biodiesel FAME content).

Related Standards

Understanding and implementing EN ISO 12966-4:2026 may require familiarity with other related international standards for fats and oil analysis:

ISO 12966-1 - Gas chromatography of FAMEs: Guideline to modern methods.
ISO 12966-2 - Preparation of methyl esters of fatty acids for gas chromatography.
ISO 12966-3 - Preparation of methyl esters using trimethylsulfonium hydroxide (TMSH).
ISO 661 - Preparation of test samples for fats and oils analysis.
ISO 3696 - Specification and test methods for laboratory water.
ISO 5555 - Sampling of animal and vegetable fats and oils.

Adhering to these standards ensures robust, reproducible, and internationally recognized analysis of animal and vegetable fats and oils, contributing to global trade, food quality, and consumer protection.

EN ISO 12966-4:2026 PDF

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Abstract

Overview

Key Topics

Applications

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Технические детали

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