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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Free Radic Biol Med. 2014 Dec 16;80:59–66. doi: 10.1016/j.freeradbiomed.2014.12.012

Figure 2.

Figure 2

ESI-Q-MS analysis of BMPO-superoxide reaction mixture. Mass spectral features include: [BMPO+H]+ (m/z 200), [BMPO+Na]+ (m/z 222), [BMPO+HO2+H]+ (m/z 233), [BMPO+K]+ (m/z 238), [BMPO+HCO2•+H]+ (m/z 245). The inset gives an expanded view of the m/z range for the radical-bound spin trap. Spectra were normalized to the intensity of the protonated spin trap ([BMPO+H]+). The potassiated spin trap (m/z 238) is approximately 625 times more intense and off the scale. (Double Column Image, Color Reproduction online/print)