Revolutionizing Pesticide Analysis in Foods of Animal Origin with Advanced GC Techniques

Author：JIANGXI AIYI HI-TECH CO., LTD. Click： Time：2025-01-15 16:58:42

As globalization transforms food supply chains, ensuring food safety and compliance with pesticide residue legislation has never been more critical. A groundbreaking study by the European Union Reference Laboratory for Pesticides in Food of Animal Origin and Commodities with High Fat Content (EURL-AO) has introduced a revolutionary method for analyzing gas chromatography (GC)-amenable pesticides in animal-derived foods. Published in the Journal of Chromatography A, this innovative approach addresses the complexities of pesticide analysis in challenging matrices such as meat, milk, eggs, and fish.

Why Pesticide Residue Analysis Matters

Pesticides, even when used correctly, can infiltrate and accumulate in animal organisms via:

1，Deworming treatments.

2，Contaminated feed and water.

3，Hygiene products used in stables.

This accumulation poses risks to food safety, as residues transfer to consumable animal products. Regulatory bodies, including the Codex Alimentarius Commission, WHO/FAO, and the European Union, have established stringent Maximum Residue Levels (MRLs) to mitigate these risks. However, analyzing pesticides in foods of animal origin is exceptionally challenging due to the presence of complex fatty matrices such as free fatty acids, triacylglycerides, and phospholipids, which can interfere with analytical precision.

Introducing an Automated GC Solution

The study unveiled a novel automated sample preparation and purification method designed to streamline pesticide analysis in food matrices with fat contents ranging from 1–30%. Key innovations include:

1. Optimized Fat Extraction

Using a tube drive system, this method achieves rapid fat extraction with a solvent mixture of cyclohexane, ethyl acetate, and acetonitrile. This process produces fat extracts from which:

1，One aliquot is used for clean-up.

2，Another is reserved for fat content determination.

2. Automated Clean-Up Process

1，The purification process employs:

2，Gel permeation chromatography.

3，Solid-phase extraction (using primary secondary amine and C18 cartridges).

3. Comprehensive Validation

The method was validated for over 50 GC-amenable pesticides at 10 µg/kg across various matrices. Remarkably, it demonstrated high analyte validation rates even at 0.5 µg/kg:

1，70% in milk.

2，80% in cheese.

3，82% in eggs and dairy products.

4，85% in fish and offal.

Further advancements expanded the pesticide spectrum to include 196 GC-amenable analytes, achieving a 40% increase in analyte quantification compared to traditional methods.

Benefits of the New Method

This automated GC approach delivers multiple advantages:

1. Enhanced Laboratory Efficiency

Optimized fat extraction and automated clean-up processes significantly improve laboratory workflow and increase sample throughput, making routine analysis more efficient.

2. Broader Applicability

The method is suitable for a wide range of food matrices, including gelatin, milk powder, and even insects. It eliminates the need for multiple sample arrays by enabling simultaneous fat determination and pesticide residue analysis.

3. Sustainability and Usability

With reduced solvent consumption and a continuous workflow capability, this method is both eco-friendly and user-friendly. Its reliable performance ensures clean extracts and high-quality signals, even in challenging matrices like offal.

Implications for the Food Industry

This breakthrough in GC pesticide analysis represents a significant leap forward for food safety and regulatory compliance. By extending analyte coverage and optimizing workflows, it empowers laboratories and food producers to meet stringent safety standards efficiently. As the global food supply chain grows increasingly complex, such innovations are essential for safeguarding public health and maintaining consumer trust.

Conclusion

The new automated method for analyzing GC-amenable pesticides in foods of animal origin is a game-changer for the food industry. Its reliability, ease of use, and environmental benefits make it a vital tool for modern laboratories. As pesticide residue control continues to be a priority, adopting advanced techniques like this will be critical for ensuring safe and compliant food production worldwide.

Revolutionizing Pesticide Analysis in Foods of Animal Origin with Advanced GC Techniques

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