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. Author manuscript; available in PMC: 2010 Sep 15.
Published in final edited form as: Anal Chem. 2009 Sep 15;81(18):7618–7624. doi: 10.1021/ac901003u

Figure 2.

Figure 2

(a) Normal DESI on a dried human serum spot, with ACN/CHCl3 (1:2) as the solvent (b) Reactive DESI on a dried human serum spot doped with cholesterol-d7 as internal standard A solvent of ACN/CHCl3 (1:2) with 50 ppm BA was used. (c) Product ion MS/MS spectrum of m/z 488. In each case, an aliquot (1μL) of serum was spotted onto a microscope glass slide.