Fundamentals of Mass Spectrometry
Mass spectrometry (MS) is an analytical chemistry technique that helps identify the amount and type of chemicals present in a sample by measuring the mass-to-charge ratio and abundance of gas-phase ions. A mass spectrum (plural spectra) is a plot of the ion signal as a function of the mass-to-charge ratio. From spectra, the mass of the molecular ion and fragments are used to determine the elemental composition or isotopic signature of a compound. This information is used to elucidate the chemical structures of molecules, such as pesticides or peptides. Mass spectrometry works by ionizing chemical compounds to generate charged molecules or molecule fragments and measuring their mass-tocharge ratios. As per Fundamentals of Mass Spectrometry, Mass spectrometry is an analytical tool used for measuring the molecular mass of a sample. Ionization is the atom or molecule is ionized by knocking one or more electrons off to give a positive ion. This is true even for things which you would normally expect to form negative ions or never form ions at all. Most mass spectrometers work with positive ions. New Ion activation methods for tandem mass spectrometry; this is followed by tandem mass spectrometry, which implies that the activation of ions is distinct from the laboratory research, and that the precursor and product ions are both characterized independently by their mass/charge ratios.