title: Influence of metal ions on the acquisition and quality of 252Cf plasma-desorption mass spectra.
abstract: The presence of a few mol per cent of Ca2+ ions considerably modified the 252Cf plasma-desorption mass spectrum of a phosphorylated glycolipid. In the negative-ion mode, increasing amounts of Ca2+ caused gradual disappearance of the spectrum; it was quenched at the molar ratio 3 Ca2+/4 glycolipid. Clusters as big as 5500 were observed at certain ratios of Ca2+/glycolipid. Similar, but less pronounced effects were seen in the positive-ion mode.
authors.affiliation: Institute de Physique Nucléaire, Orsay, France.
authors.forename: C
authors.initials: C
authors.lastname: Deprun
authors.forename: L
authors.initials: L
authors.lastname: Szabó
mesh_terms: D002118:Calcium / Q000494:pharmacology*; D005958:Glucosephosphates / Q000032:analysis*; D006017:Glycolipids / Q000032:analysis*; D007477:Ions; D013058:Mass Spectrometry / Q000379:methods; D010566:Virulence Factors, Bordetella / Q000737:chemistry*
chemical_list: D005958:Glucosephosphates; D006017:Glycolipids; D007477:Ions; D010566:Virulence Factors, Bordetella; C073731:2-hydroxyethyl-2-deoxy-2-(3-hydroxytetradecanamido)glucopyranoside-4-phosphate; D002118:Calcium