Recent research has spotlighted the presence of polycyclic aromatic hydrocarbons (PAHs) in everyday foods. These hydrophobic organic compounds, known for their potential link to cancer, underscore the necessity for reliable food testing to safeguard public health.
Addressing Food Safety Challenges
Identifying PAHs in food presents significant challenges. Traditional extraction methods, while cost-effective, often involve complex procedures that can be labor-intensive and environmentally detrimental. To address these issues, scientists are increasingly adopting a streamlined technique called QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe). This innovative approach enhances sample preparation efficiency, minimizes chemical usage, and optimizes recovery rates, making it a practical solution for routine food safety assessments.
A pivotal study conducted in 2025 by researchers from the Department of Food Science and Biotechnology at Seoul National University of Science and Technology, led by Professor Joon-Goo Lee, employed QuEChERS to analyze eight specific PAHs in various food items. The results were published in the journal Food Science and Biotechnology.
Accelerating Testing with High Precision
The research team utilized acetonitrile for PAH extraction from food samples and explored multiple purification techniques. Their method proved effective across different food matrices, achieving R2 values exceeding 0.99 for all eight PAHs, indicating a highly reliable measurement system.
Further analysis through gas chromatography and mass spectrometry revealed detection limits ranging from 0.006 to 0.035 µg/kg, with quantification limits between 0.019 and 0.133 µg/kg. The recovery rates were impressive, fluctuating between 86.3% and 109.6% across various concentrations, while precision remained consistent, ranging from 0.4% to 6.9%.
Interestingly, the study identified the highest PAH concentrations in soybean oil, followed by duck meat and canola oil.
Prof. Lee remarked, "This method simplifies the analytical process while showcasing high detection efficiency compared to traditional techniques. It is adaptable to a wide array of food products."
The Importance of PAH Monitoring
PAHs can form when food is subjected to high temperatures or smoke. The National Cancer Institute indicates that these compounds arise when fats and juices from meats drip onto heated surfaces, creating smoke that deposits PAHs onto the food. While animal studies have linked PAHs to cancer, the evidence in human populations remains inconclusive, highlighting the need for precise measurement tools to better understand and mitigate contamination risks.
Expanding Research Applications
Following the initial findings from SeoulTech, additional studies have refined QuEChERS methodologies for PAH detection. A 2025 study published in Foods introduced a modified QuEChERS approach, revealing significant PAH levels in smoked fish products and grilled chicken feet as potential health concerns.
Another 2025 study focused on cereals, employing a modified QuEChERS method that detected PAHs in a limited number of samples, emphasizing the variability of PAH levels across different food types.
Enhancing Food Safety and Environmental Practices
This innovative PAH testing method promises to bolster food safety management by facilitating thorough inspections before products reach consumers. It also aims to reduce costs and improve laboratory conditions by streamlining procedures and minimizing hazardous chemical use.
In conclusion, advancements in food safety testing are paving the way for faster, cleaner, and more accurate detection methods. Innovations like QuEChERS hold the potential to uncover hidden contaminants, enhance food production safety, and contribute to a more sustainable laboratory environment.
About Professor Joon Goo Lee
Professor Joon Goo Lee is a leading expert in food regulation and safety assessment at Seoul National University of Science and Technology. His extensive research focuses on reducing contaminants in food, ultimately promoting public health.
