Selenium is a chemical element with the symbol Se and atomic number 34. It belongs to the chalcogen group on the periodic table, along with oxygen, sulfur, tellurium, and polonium. Selenium is a nonmetal[1] and has several important applications in various industries, including electronics, glass manufacturing, and agriculture.
The history of mass spectrometry has its roots in physical and chemical studies regarding the nature of matter.
Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.
