title: Fast atom bombardment--tandem mass spectrometry studies of organo-alkali metal ions of small peptides.
mesh_terms: D007477:Ions / Q000032:analysis; D013058:Mass Spectrometry; D008670:Metals / Q000032:analysis; D010455:Peptides / Q000032:analysis*
chemical_list: D007477:Ions; D008670:Metals; D010455:Peptides