exp8 - Introduction Objective: The objective of this...

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Introduction Objective: The objective of this experiment is to calculate the concentrations of hydrocarbons in a mixture using gas-liquid chromatography with thermal conductivity detector. Theory: Gas chromatography is a separation technique where the desired component is partitioned between two phases, namely, stationary phase and mobile phase. In gas-liquid chromatography, the mobile phase consists of inert carrier gas and the stationary phase a high boiling, thermally stable liquid film supported on inert solid. If the sample is injected on to the top of the column it will move through the column with each component. If two component A and B are present, one which spends more time in the mobile phase will emerge first. The time spent in the mobile phase will be determined by the distribution ratio between the two phases. The time taken from the moment of sample injection to the emergence of the peak maximum of a component is called the retention time of the component. Retention time is characteristic of the substance and can be used to identify it. 1
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This note was uploaded on 04/13/2011 for the course CHEM 311 taught by Professor Alial-habib during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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exp8 - Introduction Objective: The objective of this...

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