S2 Fig. Ion suppression for aniline, 4-aminopyridine and 4-aminobenzontrile Left: ESI-MS response in presence of 1 mM different, pH-modifying electrolytes.

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S2 Fig. Ion suppression for aniline, 4-aminopyridine and 4-aminobenzontrile Left: ESI-MS response in presence of 1 mM different, pH-modifying electrolytes. Analyses carried out a) by sample flow injection in 50% ACN on the Esquire 3000+ or b) by sample flow injection in 80% ACN on the Esquire 3000+ Bottom: mass spectrum of the sodium adduct of 4-aminobenzonitrile in 1 mM NaCl on the Esquire 3000+ 81 119 141 0.0 0.5 1.0 1.5 2.0 2.5 5 x10 Intensity 60 80 100 120 140 160 180 200 220 240 m/z MH+ MNa+