<Tr> <Th> Related </Th> <Td> Chromatography Aqueous normal - phase chromatography Hydrophilic Interaction Chromatography Ion exchange chromatography Size exclusion chromatography Micellar liquid chromatography </Td> </Tr> <Tr> <Th> Hyphenated </Th> <Td> Liquid chromatography - mass spectrometry </Td> </Tr> <P> High - performance liquid chromatography (HPLC; formerly referred to as high - pressure liquid chromatography), is a technique in analytical chemistry used to separate, identify, and quantify each component in a mixture . It relies on pumps to pass a pressurized liquid solvent containing the sample mixture through a column filled with a solid adsorbent material . Each component in the sample interacts slightly differently with the adsorbent material, causing different flow rates for the different components and leading to the separation of the components as they flow out the column . </P> <P> HPLC has been used for manufacturing (e.g. during the production process of pharmaceutical and biological products), legal (e.g. detecting performance enhancement drugs in urine), research (e.g. separating the components of a complex biological sample, or of similar synthetic chemicals from each other), and medical (e.g. detecting vitamin D levels in blood serum) purposes . </P>

How hplc is used as a separation technique