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Eur. J. Mass Spectrom. 3, 229 - 232 (1997) |
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Matrix-assisted laser desorption/ionisation mass spectra of antibiotic and cryptand complexes of alkali metal ions: a comparison with electrospray ionisation mass spectra | ||
Stephen F. Ralph* and Margaret M. Sheil |
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ABSTRACT: | ||
Matrix-assisted laser desorption/ionisation (MALDI) mass spectra of samples containing valinomycin and all of the alkali metal ions suggest that the relative concentrations of metal complexes in solution play a role in determining relative peak intensities. However, in analogous studies performed using three cryptand ligands the most intense peak from a metal complex in each case was that due to the lithium complex, indicating that MALDI is not a reliable guide to the metal ion selectivities of this class of ligands. | ||
Keywords: MALDI, electrospray, ESI-MS, mass spectrometry,valinomycin, cryptand. |
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