Mass spectrometry is a highly specialized technique used for the analysis of chemical and biological substances. Some of the synonyms or related terms used for mass spectrometry include MS, mass spectroscopy, and mass spectrometrics. Other closely related terms are tandem mass spectrometry or MS/MS, Fourier transform mass spectrometry (FT-MS), ion trap mass spectrometry (IT-MS), and time-of-flight mass spectrometry (TOF-MS). These techniques are used in various fields such as chemistry, biology, pharmacy, and forensics for the identification, quantification, and characterization of different substances, including peptides, proteins, drugs, metabolites, organic compounds, and environmental pollutants. Mass spectrometry has been an essential tool for research, diagnostics, and quality control in different industries.