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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2016 Oct 26;28(4):608–618. doi: 10.1007/s13361-016-1521-y

Figure 1.

Figure 1

(a) Relative abundances of carbonyl-DNPH standards analyzed using nano-ESI in positive and negative modes. (b) MS2 spectrum of acetaldehyde-DNPH in positive mode and (c) MS2 spectrum of acetaldehyde-DNPH in negative mode.