gas chromatography


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gas chromatography

[¦gas ‚krō·mə′täg·rə·fē]
(analytical chemistry)
A separation technique involving passage of a gaseous moving phase through a column containing a fixed adsorbent phase; it is used principally as a quantitative analytical technique for volatile compounds.
References in periodicals archive ?
The increasing demand for petroleum, petrochemical, fine & specialty chemicals natural gas, and industrial gas globally is expected to drive the growth of global gas chromatography market, as gas chromatography techniques are widely used in analysis and purification of these products.
More recently, detection limits for selected Aroclors determined by liquid-liquid partitioning followed by headspace solid-phase microex-traction and gas chromatography atomic emission detection are reported as 0.
Milestones in the Development of Gas Chromatography
The two earlier groups of paraffin and intermediate can readily be analyzed as regards the distribution of their hydrocarbon components over the whole carbon number range by high temperature gas chromatography and, by incorporating a known amount of a pure alkane hydrocarbon as an internal standard, the alkane content of the wax can be determined quantitatively.
Imunoafiniu columns, solid phase extraction columns, liquid chromatography and gas chromatography columns and accessories required for purchase.
To detect Schwartz's cholesterol by-product, for example, requires a gas chromatography column and a mass spectroscope.
Global Markets for Reagents for Chromatography -- Focus on Gas Chromatography
Total quantity or scope: Gas chromatography with MS center and analytical pyrolysis plant GC / MS + Pyro and differential scanning calorimeter No Purchase of the project.
Table 79: Rest of Asia-Pacific Historic Review for Gas Chromatography Systems by End-Use Segment - Chemical & Pharmaceutical, Clinical, Environmental, Petrochemicals, Food & Beverages, Research and Other End-Use Markets Independently Analyzed with Annual Sales Figures in US$ Thousand for Years 2006 through 2012 (includes corresponding Graph/Chart) III-82 Table 80: Rest of Asia-Pacific 15-Year Perspective for Gas Chromatography Systems by End-Use Segment - Percentage Breakdown of Dollar Sales for Chemical & Pharmaceutical, Clinical, Environmental, Petrochemicals, Food & Beverages, Research and Other End-Use Markets for Years 2006, 2014 and 2020 (includes corresponding Graph/Chart) III-83
Despite the power of modern analytical instrument techniques of analysis, such as gas chromatography and mass spectrometry, one of the most important challenges is said to remain that of sample preparation, especially for non-volatile, insoluble materials and chemicals.
In the lab, the team then used gas chromatography to measure 15 specific VOCs.
PRINCIPLES AND APPLICATIONS OF GAS CHROMATOGRAPHY IN FOOD ANALYSIS.

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