Fig. 2
From: Chemical assessment of mycotoxin contaminants and veterinary residues in Costa Rican animal feed
Chromatogram comparison of a feed sample (blue line) extrated for mycotoxins and a 1000 μg L− 1 standard of all toxins assayed (red line). b Monensin feed grade samples (olive line), a monensin 10,000 μg L− 1 standard (blue line) and a sample blank (excipient alone, green line)