Overview
ISO 19343:2017 - Microbiology of the food chain - specifies an HPLC method for the detection and quantification of histamine in fish and fishery products (including fish sauces and enzyme‑matured products) intended for human consumption. Developed to support food safety monitoring and regulatory compliance (notably European Regulation 2073/2005), the standard defines sample preparation, extraction, derivatization, chromatographic separation and calculation procedures for reliable histamine analysis.
Key topics and technical requirements
- Scope: Analysis of histamine in a broad range of fish and fishery matrices.
- Extraction: Sample homogenization (typical test portion 5 g) and extraction with perchloric acid.
- Internal standard: Use of 1,7‑diaminoheptane as recommended internal standard for peak‑area ratio quantification.
- Derivatization: Pre‑column derivatization with dansyl chloride, followed by quenching with L‑proline; typical incubation 5 min at 60 °C then 15 min in the dark.
- Purification: Organic phase extraction using toluene, evaporation under nitrogen and reconstitution in acetonitrile/water (60/40) prior to HPLC.
- Chromatography: HPLC or UHPLC systems; example column Kromasil® C18 (25 cm × 4.6 mm, 5 µm), UV detection at 254 nm, refrigerated autosampler and column oven (≈25 °C) recommended. Annex A provides indicative LC parameters.
- Calibration & calculation: Matrix‑matched calibration using histamine stock spikes; linear regression of histamine/internal standard area ratios to obtain concentration. Formulas for calibration and sample quantification are provided.
- Quality/performance: Precision metrics (repeatability and reproducibility) are reported from an interlaboratory study (Annex B). Use grade‑1 water (ISO 3696) and HPLC‑grade solvents.
- Safety: Standard warns users to follow normal laboratory safety and health practices.
Applications
- Regulatory compliance testing of seafood for scombroid (histamine) poisoning risk.
- Quality control in seafood processing, canning, fermentation and fish sauce production.
- Import/export screening and official control laboratories.
- Food safety incident investigations and public health laboratories assessing suspected histamine poisoning.
Who should use this standard
- Food testing and analytical laboratories performing histamine assays.
- Seafood processors and QC teams implementing routine monitoring.
- Regulatory agencies and official control laboratories enforcing microbiological/chemical criteria.
- Method developers validating comparable HPLC/UHPLC procedures.
Related standards and references
- ISO 3696 - Water for analytical laboratory use (referenced for water purity).
- European Regulation 2073/2005 - Microbiological criteria for foodstuffs (context for method adoption).
Keywords: ISO 19343:2017, histamine detection, HPLC method, fishery products, biogenic amines, dansyl chloride, food safety, seafood testing, regulatory compliance.