Figure 5.

LC-QTOF/MS profile of ZON degradation. (A) Electrospray ionization (ESI)total ion chromatogram (TIC) scan of positive control (0.15 mL AFB₁ (50 ppm) solution was added to 1.35 mL NB for final concentration of 5 ppm. After incubation in the dark at 37 °C for 72 h, the samples were extracted with chloroform); (B) ESI extracted ion chromatogram (EIC) scan of positive control; (C) ESI TIC scan of negative control (0.15 mL methanol instead of AFB₁ solution was used as negative control); (D) ESI EIC scan of negative control; (E) ESI TIC scan of sample (0.15 mL AFB₁ (50 ppm) solution was added to 1.35 mL culture supernatant of N17-1 for final concentration of 5 ppm. After incubation in the dark at 37 °C for 72 h, the samples were extracted with chloroform); (F) ESI EIC scan of sample.