Schuyler Mincemoyer Gas Chromatography Block Diagram Carrier Flow Sample Column Detector Data Gas Tank Regulators Injection Spot System Oven (temperature controlled) Display of Graph Carrier Gas Supply: A chemically inert gas to prevent cross reactions which serves as the mobile phase of the reaction. Examples include argon, nitrogen, hydrogen, and helium. Flow Regulators: Is used to measure precise amounts of pressure that will be used to run the instrument. Oven: This contains the injector, the column, and the detector. It contains a thermostat because the temperature must be controlled at all times to obtain accurate and precise readings. Sample Injection Spot: The injector volatizes the sample because it must be in the form of a vapor or gas to continue through the analysis. Column: The sample runs through either a capillary or packed column. Capillary columns are more frequently used as their diameter is a few nanometers. This allows the column to be coiled and provides a larger distance for the sample to travel. Detector: This determines what components make up the sample you injected earlier. There are many different kinds, all of which have their own strengths and weaknesses. Data System: Where the Data is collected and gathered to generate a easy to read analysis. Display of Graph: A visual representation of the data on a monitor. Vendors: Alltech, PerkinElmer, Hewlett-Packard, Shimadzu, Thermo Electron Corporation, and Varian Inc. *The most expensive gas chromatography instrument I could find was the Hewlett Packard 6890 Series II Plus Gas Chromatograph with HP 7673 Auto Sampler, GC #5. It costs $12,500 on Ebay. *The least expensive one was the HP 5890 Series II GC Gas Chromatograph which costs $3,000. It was a pretty old model. Articles using Gas Chromatography 1. Coupling a High-Temperature Catalytic Oxidation Total Organic Carbon Analyzer to an Isotope Ratio Mass Spectrometer To Measure Natural-Abundance δ13C-Dissolved Organic Carbon in Marine and Freshwater Samples Robert J. Panetta, Mina Ibrahim and Yves G lina Analytical Chemistry., 2008, 80 (13), pp 5232–5239 2.A New Technology for Producing Hydrogen and Adjustable Ratio Syngas from Coke Oven Gas Jun Shen and Zhi-zhong Wang, Huai-wang Yang and Run-sheng Yao wwwwwEnergy Fuels, 2007, 21 (6), pp 3588–3592 3. Temperature-Induced Inversion of the Elution Order of Enantiomers in Gas Chromatography: N-Ethoxycarbonyl Propylamides and N-Trifluoroacetyl Ethyl Esters of α-Amino Acids on Chirasil-Val-C11 and Chirasil-Dex Stationary Phases Pavel A. Levkin,, Anna Levkina,, Harri Czesla, and, Volker Schurig Analytical Chemistry 2007 79 (12), 4401-4409 Everyday uses for Gas Chromatography 1. It could be used in a Environmental lab to test for environmental contaminant such as fertilizers and their contents. 2. It could be used nutritionally to test all the for the parts listed on nutrition labels though separating each part of the food.
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