Determination of Virginiamycin, Erythromycin, and Penicillin in Dried Distillers Grains with Solubles

The FDA has raised concern over food producing animals consuming distillers grains with antibiotic residues, and how this may lead to increased antibiotic resistance in humans and animals. This application note describes a method to determine erythromycin, penicillin, and virginiamycin S1 and M1 in dried distillers grains with solubles using high-performance liquid chromatography (HPLC).