title: Ion source for liquid matrix secondary ionization mass spectrometry.
mesh_terms: D001920:Bradykinin / Q000032:analysis; D002586:Cesium; D006096:Gramicidin / Q000032:analysis; D007328:Insulin / Q000032:analysis; D013058:Mass Spectrometry / Q000295:instrumentation*
chemical_list: D007328:Insulin; D006096:Gramicidin; D002586:Cesium; D001920:Bradykinin