Fig. 1From: In vivo imaging of free radicals produced by multivitamin-mineral supplementsThe ascorbate free radical and OSL can be monitored simultaneously by EPR. The spectra of ascorbate free radical (g = 2.005, aH = 1.8 G) and the oxygen sensitive label (tetrathiatriarylmethyl radical; g = 2.003) have no significant overlap and their concentrations are low enough so that each can be analyzed independently without concern of interactionsBack to article page