Ballantine, David Stephen
M.S. (Master of Science)
Department of Chemistry
Gas chromatography--Data processing; Vapors--Analysis--Data processing
When thermodynamic properties are studied, solute concentrations must be known accurately. In chemical sensor studies, vapor generators are commonly used. The output of these generators can be affected by the fluctuations in temperature of the box, the volume of the solvent in a bubbler, and pressure differences in the system. An automated vapor sampling analysis system was developed for real time verification of test vapor concentrations used in sensor studies generated by a VG-400 vapor system. A two position electronic actuator is automated via computer with an analog/digital 1-0 board and software written in Visual Basic to perform the sampling. The analysis is accomplished with a Varian 3400 CX gas chromatograph interfaced to the same computer via an analog/digital 1-0 board and software. This system was hooked in series between the vapor generator and the sensors being studied for near instantaneous quantitation of single and multi-component vapors. Comparisons are made between actual GC measured concentrations from the sampling system and the reported VG-400 dilution concentration.
Torkelson, Timothy C., "Development and evaluation of an automated in-line GC system for verification of vapor stream concentrations" (1995). Graduate Research Theses & Dissertations. 2158.
viii, 55 pages
Northern Illinois University
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