Mass Calibration of Time of Flight Mass Spectrometer Using Alkali Salts

Time of flight (TOF) mass spectrometry is one of the most important methods for quantitative and qualitative analysis of materials. The ionization source in TOF mass spectrometry can be electron impact, laser and synchrotron radiation. In this method the ions, produced by direct ionization or thermal desorption from an ionic salts, accelerated in a uniform electric field and then separated in a field free region based on their masses to charge ratio. In TOF mass spectrometry, the m/z ratio is proportional to the square of flight time. For accurate calibration known masses are required to obtain the parameters for converting the flight time to mass. In this work, the TOF mass spectra of alkali halides including LiCl, KCl, NaCl, CsCl and their mixtures were recorded and used for mass calibration.

کلیدواژه ها:

Time of Flight ، Calibration ، Alkali halides ، Clusters