Overview
ISO 13493:2021 - Meat and meat products: Determination of chloramphenicol content (reference method) specifies validated analytical procedures for detecting the antibiotic chloramphenicol in meat and meat products. It defines two complementary methods: a liquid chromatography (LC) method and an enhanced liquid chromatography–tandem mass spectrometry (LC‑MS/MS) method, with LC‑MS/MS designated as the reference method. The document covers muscle tissue and-as expanded-casing and liver from livestock, poultry (and seafood in the revised scope), and describes sampling, sample preparation, analysis and reporting requirements.
Key topics and technical requirements
- Methods and principles
- LC: aqueous extraction, solid‑phase extraction, elution with dichloromethane, liquid‑liquid purification and reverse‑phase chromatography with UV detection.
- LC‑MS/MS (reference): extraction with ethyl acetate, defatting with n‑hexane, cleanup using HLB solid‑phase extraction, and confirmation/detection by LC‑MS/MS in MRM mode (negative ionization).
- Detection capability
- LC method suitable for chloramphenicol > 6.5 mg/kg.
- LC‑MS/MS suitable for chloramphenicol > 0.1 μg/kg (high sensitivity for trace residue analysis).
- Sample handling and preparation
- Recommended representative sample size: at least 200 g; homogenize without exceeding 25 °C; analyze as soon as possible and within 24 h of homogenization. Deteriorated samples cannot be analysed reliably.
- Quality and performance
- Requirements for reagents, apparatus (e.g., membranes, SPE cartridges, centrifuge, pH meter), calibration standards and mobile phases.
- Precision data: interlaboratory testing, repeatability and reproducibility guidelines are included.
- Reporting
- Test report content and calculation procedures for expressing chloramphenicol mass fraction (μg/kg).
Applications and users
ISO 13493:2021 is designed for:
- Food safety and public‑health laboratories performing routine surveillance and confirmatory testing for banned/regulated veterinary residues.
- National reference and regulatory agencies that require a traceable reference method (LC‑MS/MS) for enforcement.
- Commercial food testing laboratories and meat/seafood producers implementing quality control and supplier verification programs.
- Research laboratories studying residue occurrence and method performance.
Practical use cases include regulatory compliance testing, import/export screening, contamination investigations and validation of in‑house methods against a standardized reference.
Related standards
- ISO 17604 (recommended sampling procedures for meat products)
- ISO 3696 (water for analytical laboratory use) - referenced for reagent quality
Keywords: ISO 13493:2021, chloramphenicol, LC‑MS/MS reference method, meat testing, residue analysis, food safety, detection limit, sample preparation.