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. Author manuscript; available in PMC: 2018 Apr 10.
Published in final edited form as: Anal Chem. 2018 Jan 9;90(3):1967–1975. doi: 10.1021/acs.analchem.7b04049

Figure 1.

Figure 1

Experimental set up and configurations of (A) the offline SPD with LC-MS, and (B) automated online SPD-LC-MS for the analysis of GSNO. The experimental sequence involves activation (A1 and B1), modification (A2 and B2), derivatization (A3 and B3), and detection (A4 and B4); operation B is the automated version of operation A.