At the heart of HPLC lies the principle of chromatographic separation. A sample is dissolved in a liquid mobile phase and injected into a column packed with a stationary phase. The components of the sample interact differently with the stationary phase, resulting in their separation based on various physicochemical properties such as size, polarity, and charge. HPLC instruments consist of a pump to deliver the mobile phase, an injector for sample introduction, a column for separation, a detector to identify analytes, and a data system for analysis. The system operates at high pressures, typically in the range of 3000-5000 psi, which is crucial for achieving high-resolution separations. High-Performance Liquid Chromatography stands as a cornerstone in the realm of analytical chemistry, continually evolving to meet the demands of diverse scientific disciplines. Its ability to provide precise and reliable data makes it an indispensable tool for researchers striving to unravel the complexities of chemical and biochemical systems. As technology advances, HPLC continues to push the boundaries, opening new avenues for scientific exploration and discovery.