Elemental sulfur as a versatile low-mass-range calibration standard for laser desorption ionization mass spectrometry |
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Authors: | Andrew Kruegel Athula B. Attygalle |
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Affiliation: | 1. Center for Mass Spectrometry, Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, USA
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Abstract: | 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. |
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