Mass Spectrometry FundamentalsKey topics:Mass spectrometer Ionization,Mass analyzers,Mass spectrometersCharge state of protein and peptides MALDI-TOF MS,ESI MSMass spectrum Isotope and mass,Isotope abundanceQuality parameters of mass spectrometer Resolution,Mass accuracy,SensitivityIsotopic Abundance(a+b)nMass Spectrum with Sulfur=Mass Spectrum with Chlorine=Mass Spectrum with Bromine=Mass Spectra of AlkanesMore stable carbocations will be more abundant.=Mass Spectra of AlkenesResonance-stabilized cations favored.=