Schuyler Mincemoyer High Performance Liquid Chromatography To Waste Block Diagram: Pulse Damper Regulated Helium Source Output Check Valve Pump Drain Valve Inlet Check Valve Solvent Reservoirs Sparger Priming Syringe Solvent Proportioning Valve Column Inlet Filter Pressure Transducer Injector Valve Back-Pressure Regulator Filter To Detector Components Solvent Reservoir: Holds 500mL or more of a solvent. Sparger: dissolves gases that are swept out of solution by fine bubbles of an inert gas that is not soluble in the mobile phase. Pump: There are generally two types of pumps (reciprocating and displacement), but are used to pump the liquids. Needs to generate pressure up to 6000 psi, have pulse free output, flow rates ranging from 0.110mL/min and resistance to corrosion by a variety of solvents. Pulse Damper: Used to remove any pulses that may be in the solvent as a result of pumping. Back-Pressure Regulator: Balances inlet and outlet pressures going to injector. Injector valve: Inject sample into a loop and then move the handle and the entire loop of sample is inserted between the pump and the column so the mobile phase sweeps the sample onto the column. Column: Can be made from heavy-walled glass tubing, polymer tubing, or smooth-bore stainless steel tubing. There are different kinds of columns including analytical columns and guard columns. Detectors: The sample is then sent to some kind of detector such as a UV-Vis, Infrared Absorption, Fluorescence, or Refractive-Index detectors. Vendors: Agilent Technologies, Beckman Coulter INC. Cecil Instruments, Dion Corp, Perkin Elmer, Shimadzu, Theromo Fisher, and Varian The most expensive HPLC I could find was selling for $24,000. It was a USED Waters Acquity 2007 HPLC system on http://www.dotmed.com/listing/740676?utm_source=base&utm_medium=search&utm_campaign=Base The cheapest HPLC I could find was selling for $499.00 on Ebay. It was a Walter 717 Autosampler. http://cgi.ebay.com/Waters-717-Plus-HPLCAutosampler_W0QQitemZ110490475944QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1 9b9bedda8 Articles: Analysis of Pharmaceuticals in Water by Isotope Dilution Liquid Chromatography/Tandem Spectrometry Brett J. Vanderford and, Shane A. Snyder Environmental Science & Technology 2006 40 (23), 7312-7320 Mass Selective Analysis of Secondary Amino Acids in Gelatin Using Pulsed Electrochemical Detection Jason D. Russell, John M. Dolphin, and Miles D. Koppang Analytical. Chemistry., 2007, 79 (17), pp 6615–6621 Facile Identification and Quantitation of Protein Phosphorylation via β-Elimination and Michael Addition with Natural Abundance and Stable Isotope Labeled Thiocholine Meng Chen, Xiong Su, Jingyue Yang, Christopher M. Jenkins, Ari M. Cedars and Richard W. Gross Analytical Chemistry., 2010, 82 (1), pp 163–171 Everyday Uses For HPLC 1) The government uses HPLC to test confiscated narcotics 2) It can also be used to help test environmental samples such as water from a drain area or stream.