title: Characterization of three rifamycins via electrospray mass spectrometry and HPLC-thermospray mass spectrometry.
abstract: Rifamycins are a class of antibiotic compounds of which rifampicin is the most commonly prescribed. Conventional electron-impact mass spectrometry of rifampicin has not been found to provide useful data. Thermospray and electrospray mass spectrometry are studied as potential tools for the analysis of rifampicin, rifamycin SV, and rifamycin B. Using thermospray and electrospray ionization, all three compounds provide significant ion intensity for either the [MH]+ or [MNa]+ ions. In addition, combined high-performance liquid chromatography-thermospray mass spectrometry provides useful analytical data for a mixture of the three rifamycins.
authors.affiliation: Department of Health and Human Services, Food and Drug Administration, Jefferson, Arkansas 72079.
authors.forename: W A
authors.initials: WA
authors.lastname: Korfmacher
authors.forename: J
authors.initials: J
authors.lastname: Bloom
authors.forename: M I
authors.initials: MI
authors.lastname: Churchwell
authors.forename: T A
authors.initials: TA
authors.lastname: Getek
authors.forename: E B
authors.initials: EB
authors.lastname: Hansen
authors.forename: C L
authors.initials: CL
authors.lastname: Holder
authors.forename: K T
authors.initials: KT
authors.lastname: McManus
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods*; D015394:Molecular Structure; D012293:Rifampin / Q000737:chemistry*; D012294:Rifamycins / Q000737:chemistry*
chemical_list: D012294:Rifamycins; C033974:rifamycin B; C023808:rifamycin SV; D012293:Rifampin