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.
Center for Mass Spectrometry, Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA.
Andrew
A
Kruegel
Athula B
AB
Attygalle