hplc - high performance liquid chromotography (3826-hp)

overview of hplc - high performance liquid chromotography (3826-hp)

— high-performance liquid chromatography (hplc - aka 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. 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. chromatography can be described as a mass transfer process involving adsorption. hplc relies on pumps to pass a pressurized liquid and a sample mixture through a column filled with adsorbent, leading to the separation of the sample components. the active component of the column, the adsorbent, is typically a granular material made of solid particles (e.g. silica, polymers, etc.). the components of the sample mixture are separated from each other due to their different degrees of interaction with the absorbent particles. the pressurized liquid is typically a mixture of solvents (e.g. water, acetonitrile and/or methanol) and is referred to as a mobile phase. its composition and temperature play a major role in the separation process by influencing the interactions taking place between sample components and adsorbent. .