ISO 24276:2006

Overview - ISO 24276:2006 (GMO detection in foodstuffs)

ISO 24276:2006 defines general requirements and definitions for methods used to detect genetically modified organisms (GMOs) and derived products in foodstuffs. The standard explains how to apply and link complementary standards for sampling, nucleic acid extraction, qualitative and quantitative nucleic acid analysis and protein-based methods. While established for food matrices, ISO 24276 can also be applied to seeds, feed and environmental plant samples. The document is primarily focused on PCR-based approaches but remains technology‑neutral for future methods.

Key topics and technical requirements

• Scope and relationships: Clarifies how ISO 21571 (DNA extraction), ISO 21569 (qualitative nucleic acid methods), ISO 21570 (quantitative nucleic acid methods), ISO 21572 (protein methods) and EN/TS 21568 (sampling strategies) work together.
• Definitions: Standardizes terminology such as target taxon, test sample, screening method, construct‑specific and event‑specific methods, LOD (limit of detection) and LOQ (limit of quantitation).
• Method performance: Addresses specificity, sensitivity, accuracy, trueness, precision, repeatability and reproducibility. Refers to collaborative trials and validation principles (e.g., ISO 5725-1).
• Laboratory requirements: Guidance on laboratory set‑up, use of controls (including DNA/PCR controls), sample handling and avoidance of contamination.
• Validation and fitness for purpose: Defines applicability range, measurement uncertainty and criteria for demonstrating that a method suits its intended use.
• Interpretation and reporting: Provides rules for interpreting controls, expressing negative/positive/ambiguous results and minimum content for test reports and quality assurance.

Practical applications and who uses it

ISO 24276 is used by:

• Testing laboratories performing GMO screening, identification and quantification in food and feed.
• Regulatory agencies that set or verify compliance with labeling and safety rules.
• Food manufacturers and quality teams implementing supply‑chain testing and supplier verification.
• Reference material developers and proficiency-test organizers aligning validation and interlaboratory studies.
• Research groups and method developers designing or validating PCR and alternative detection assays.

Benefits include consistent terminology, harmonized validation criteria, improved traceability of results and clearer reporting for regulatory and commercial decisions.

Related standards

• EN/TS 21568 - Sampling strategies for GMO analysis
• ISO 21571 - Nucleic acid extraction
• ISO 21569 - Qualitative nucleic acid based methods
• ISO 21570 - Quantitative nucleic acid based methods
• ISO 21572 - Protein based methods
• ISO 5725-1 - Accuracy (trueness and precision) fundamentals

Keywords: ISO 24276:2006, GMO detection, foodstuffs, PCR, nucleic acid extraction, method validation, LOD, LOQ, screening method, event-specific, construct-specific, laboratory quality assurance.