Mass spectrometry is a powerful analytical technique used to identify and quantify the chemical composition of a sample. It works by ionizing molecules in a sample, separating them based on their mass-to-charge ratio, and detecting the ions to create a mass spectrum. Mass spectrometry is widely used in various fields such as chemistry, biochemistry, environmental science, and forensics for applications such as drug testing, protein identification, and environmental monitoring. It can provide valuable information about the structure, composition, and concentration of molecules in a sample, making it a versatile tool in the scientific community.