High Speed GC
Gas Chromatography ( GC ) is the most widely used analytical technique for the speciation and quantification of organic compounds. The total cost for these analyses is enormous. Protracted sample turnaround times, which are common for contract laboratories, cause expensive bottlenecks. Dramatic reductions in analysis time could lead to significant economic advantages for applications involving environmental and chemical process monitoring. This report considers several emerging technologies that have made high-speed GC (HSGC) practical and useful for a rapidly increasing range of applications. Stragedies, instruments and procedures are being developed for increasing the speed of capillary gas chromatography by a factor of a hundred or more. This would make gas chromatography far more useful for chemical process monitoring, general laboratory applications and environmental monitoring. Completely automated instru
Basic theory of High Speed Gas Chromatography in which L is the column length, u is the average carrier gas velocity in the column, and kn the retention factor of the last component of interest. As it can be seen from the equation higher gas velocities, shorter columns, and relatively small retention factors can decrease separation times by 1 or 2 orders of magnitude (1). However, there are some disadvantages of HSGC such as: greatly reduced resolution power caused by increased effects of band broadening and reduced peak capacity. Equation 2 shows the peak variance resulting from extra-column source only: ------------------------------------------------------------------------ General operating requirements for HSGC are easily obtained from equation 1, which gives the separation time as the retention time tR of the last component of interest (2) h speeds. Data systems, detectors and temperature programming rates wer
Some common words found in the essay are:
Chromatography HSGC, GC HSGC, Chromatography GC, Gas Chromatography, Reducing GC, Capillary GC, gas chromatography, peak capacity, speed gas chromatography, Speed Gas, gas chromatography gc, chemical process monitoring, capillary column, process monitoring, fast analytical, capillary gas, capillary gas chromatography, speed gas, chromatography gc, chemical process, shorter columns,
Approximate Word count = 626
Approximate Pages = 3 (250 words per page double spaced)
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