Determination of
a single “fingerprint” mass spectrum of a biologically active compound,
required for compound identification in mixtures
and biological materials in such applied tasks as ecological monitoring and
biological imaging, may become a nontrivial problem for labile compounds
whose mass spectra depend strongly on the applied experimental conditions.
In the present
communication, qualitatively different mass spectral patterns obtained for the
bisquaternary ammonium salt ethonium Cat2+•2Cl– under varied conditions of
electrospray ionization and matrixassisted laser desorption/ionization (MALDI)
are described and systematized.
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