Tiêu chuẩn quốc gia TCVN 14438:2025

Polycyclic Aromatic Hydrocarbons (PAHs) represent a class of environmental contaminants, with several members recognized for their carcinogenic potential. Their presence in various foodstuffs poses a considerable public health concern, necessitating robust analytical methods for food safety monitoring. This national standard addresses this critical need by detailing a precise methodology for the determination of specific PAHs, including Benzo[a]pyrene, Benz[a]anthracene, Chrysene, and Benzo[b]fluoranthene, in a wide range of food products. Utilizing Gas Chromatography-Mass Spectrometry (GC-MS), this method ensures accurate and reliable quantification, thereby supporting regulatory efforts and safeguarding consumer health against these hazardous compounds.

Các phòng thử nghiệm phân tích thực phẩm, cơ quan quản lý chất lượng và an toàn thực phẩm, nhà sản xuất thực phẩm và các nhà nghiên cứu trong lĩnh vực an toàn thực phẩm.

This national standard, TCVN 14438:2025, establishes a comprehensive method for the determination of Polycyclic Aromatic Hydrocarbons (PAHs) in foodstuffs using Gas Chromatography-Mass Spectrometry (GC-MS). Specifically, it targets the quantification of Benzo[a]pyrene, Benz[a]anthracene, Chrysene, and Benzo[b]fluoranthene, while also allowing for the identification of twelve other PAHs. The methodology begins with thorough sample homogenization and preparation, followed by robust extraction techniques such as pressurized liquid extraction (PLE) or Soxhlet extraction to efficiently isolate PAHs from diverse food matrices including extruded flour, smoked fish, infant formula milk powder, meat sausages, dried clams, edible oils, and flours. Subsequent cleanup steps, employing Size Exclusion Chromatography (SEC) and Solid Phase Extraction (SPE), are critical for removing interfering substances and ensuring the purity of the analytical extract. The final determination is performed via GC-MS, utilizing stable isotope-labelled internal standards for accurate quantification. The standard details performance characteristics, including impressive limits of detection (0.30 µg/kg) and quantification (0.90 µg/kg), validated through inter-laboratory studies. It also provides extensive guidelines on reagent specifications, calibration procedures, and crucial safety warnings regarding the handling of carcinogenic PAHs. This standardized approach is invaluable for laboratories and regulatory bodies, offering a reliable framework for food analysis, enhancing food safety protocols, and ultimately safeguarding consumer health by effectively monitoring and controlling PAH contamination in the food supply chain.