Polychlorinated Alkanes in feed from the German market

Area of Science:

• Environmental Chemistry
• Food Safety Analysis
• Contaminant Monitoring

Background:

• Polychlorinated alkanes (PCAs) are persistent organic pollutants.
• PCAs can accumulate in the food chain, posing risks to animal and human health.
• Understanding PCA levels in animal feed is crucial for food safety.

Purpose of the Study:

• To quantify Polychlorinated alkanes (PCAs) in animal and plant-origin feed samples.
• To compare PCA concentrations between different feed types.
• To investigate potential sources and factors influencing PCA levels in feed.

Main Methods:

• Analysis of 47 feed samples (13 animal, 34 plant) from the southern German market in 2023.
• Gas chromatography-mass spectrometry (GC-MS) or similar techniques were likely employed for PCA quantification.
• Statistical analysis to determine median concentrations and compare feed types.

Main Results:

• Overall median PCA concentration was 10 ng/g wet weight (ww).
• Animal-origin feeds (median 44 ng/g ww) had significantly higher PCA levels than plant-origin feeds (median 8.8 ng/g ww).
• Highest PCA levels were found in plant-based fats/oils and fish meal; lowest in seeds, press cakes, and soy products.

Conclusions:

• PCA contamination varies significantly between feed types, with animal feed showing higher levels.
• Plant-based fats/oils and fish meal represent key matrices for PCA accumulation in feed.
• The observed PCA patterns may reflect the impact of European regulations like the Stockholm Convention.