Amino acids are biologically important organic compounds, composed of amine (-NH2) and carboxylic acid (-COOH) functional groups, along with a side chain attached to each amino acid. Amino acid analysis is a fundamental tool in the analysis of proteins, peptides, and other amino acid-based drugs. Amino acid analysis allows for the quantitative and qualitative analysis of the amino acid composition of samples and enables the determination of atypical amino acids that may be present in proteins and peptides.