title: Phosphazenes: high molecular weight reference compounds for field desorption mass spectrometry.
abstract: Because of poor field ionization sensitivity or an insufficient number of peaks, conventional reference materials are inadequate for field desorption mass spectrometry. Hexakis (multifluoroalkoxy)cyclotriphosphazenes satisfy a growing need for high molecular weight reference compounds amenable to either electron impact or field ionization. In comparison with tris(perfluoroalkyl)-s-triazine standards, the substituted phosphazenes offer greater volatility, easier synthesis and better mass spectral characteristics. Phosphazene mixtures, in particular, cover a broad mass range in either ionization mode, creating new measurement capabilities for ions at high masses.
mesh_terms: D002849:Chromatography, Gas; D013058:Mass Spectrometry; D008970:Molecular Weight; D009943:Organophosphorus Compounds; D013329:Structure-Activity Relationship
chemical_list: D009943:Organophosphorus Compounds