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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Anal Chem. 2010 Sep 1;82(17):7472–7478. doi: 10.1021/ac101667q

Figure 3.

Figure 3

8.0 – 10.5 eV LDPI-MS of neat trimethoprim. Includes (LD) direct ionization by laser desorption and (SB) synchrotron background at 10.5 eV. Known trimethoprim fragments indicated by asterisks.