Mass Spectral Profile for Rapid Differentiating Beta-Lactams from Their Ring-Opened Impurities

Figure 6

High energy activated CID spectra of cefixime (a) and ring-opened cefixime (b). The spectra were obtained with a Q-TOF under the mode of auto MS/MS. The activating voltages were 27.7 volt and 28.6 volt, respectively.

(a)

(b)