Figure 5

Optimization of desorption conditions. (A) Effect of H2O2 proportion in desorption solution on the BR desorption efficiencies. (B) Effect of acetonitrile proportion in desorption solution on the BR desorption efficiencies. (C) Effect of desorption volume on the BR desorption efficiencies. (D) Effect of desorption flow rate on the BR desorption efficiencies. The sampling solution was spiked with five BRs standard solution (4 ng for each BR).