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. Author manuscript; available in PMC: 2010 May 4.
Published in final edited form as: Anal Bioanal Chem. 2009 Aug 4;396(1):105–114. doi: 10.1007/s00216-009-2971-x

Fig. 2.

Fig. 2

Molecular ion signal at m/z 111 of histamine embedded in a frozen ice matrix vs. accumulated primary ion fluence. The bombardment was switched between 20-keV C60+ and 15-keV Ga+ ions at the indicated points (reproduced with permission from Ref. [43])