Figure 3

ROD curves of the egg sample extracts (a) and chicken sample extracts (b). The matrix extracts from negative samples spiked with 0.0, 1.0, 2.0, 4.0, 8.0, 16.0, 32.0, 64.0, 128.0, and 256.0 ng/mL of OP were tested by LFIST and T lines were scanned with a TSR3000 membrane strip reader.