Microfabricated capillary array electrophoresis DNA analysis systems |
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Authors: | Medintz I L Paegel B M Mathies R A |
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Affiliation: | Department of Chemistry, California State University, Chico 95929-0210, USA. tnahir@csuchico.edu |
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Abstract: | The equation of motion for a peak in a gas chromatography experiment is shown to be exact whenever the column outlet pressure is approximately zero. Based on steady-state assumptions, this equation is solved for an isothermal analysis with a single-ramp inlet-pressure or flow-rate program. Theoretical calculations of retention times are confirmed experimentally for two n-alkanes using a capillary column connected to a mass-selective detector. A slight but consistent discrepancy between theoretical and measured results is interpreted as a failure of the steady-state assumption when the magnitude of the rate of change of inlet pressure is large. |
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