Elemental sulfur as a versatile low-mass-range calibration standard for laser desorption ionization mass spectrometry.
Facile generation of series of singly charged radical anions (S(n)(-*); n = 1-15) and cations (S(n)(+*); n = 2-11) by direct laser ionization renders elemental sulfur an excellent material for the low-mass-region calibration of time of flight (TOF) mass spectrometers. Upon irradiation by a 337-nm UV laser, elemental sulfur undergoes facile ionization without the need of an additional laser-absorbing matrix. An intense and evenly spaced set of peaks is obtained in both modes.
Kruegel
Andrew
A
Center for Mass Spectrometry, Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA.
Attygalle
Athula B
AB