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. Author manuscript; available in PMC: 2011 May 15.
Published in final edited form as: Anal Chem. 2010 May 15;82(10):4130–4139. doi: 10.1021/ac100242b

Figure 3.

Figure 3

The distribution of VICATSH across the derivatized mesh was monitored by TM-DESI-MS. The 1 cm square mesh was affixed to the backing plate and scanned at a rate of 250 μm/sec, resulting in exposure of the mesh to the DESI spray for approximately 0.66 min. Photocleavage of unreacted VICATSH followed by desorption electrospray ionization and spontaneous loss of CO2 produces the stable ion of m/z 257, which corresponds to protonated 4-iodoacetamidyl-butylamine (IABA). Collisional induced dissociation (MS3) results in the formation of the product ion of m/z 198. (XIC shown)