a Micropatterns of five different concentrations of ovalbumin (OVA)-conjugated mycotoxins on the chip surface (top row: DON-OVA (200 → 12.5 μg/mL), middle row: ZEN-OVA (10 → 0.63 μg/mL), and bottom row OVA (10 → 0.63 μg/mL)). The spot size is 400 × 600 μm. b SPR sensorgrams recorded on DON (red), ZEN (blue), OVA (green), and blank (black) ROIs during the injection of DON and ZEN antibodies mixture in the buffer solution. The dashed line indicates the response difference used for calculations