Index Catalog // ScholarsArchive@OSU

The identification and quantitation of complex polycyclic aromatic hydrocarbon mixtures in environmental samples using comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry

Creator:: Manzano, Carlos A.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous contaminants and are mostly products of the incomplete combustion of organic material. PAHs are often found in environmental samples as a complex mixture of isomers. In addition, the same sources that produce complex PAH mixtures also produce other poorly characterized mixtures of organic compounds,...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Carlos A. Manzano for the degree of Doctor of Philosophy in Chemistry

A multivariate statistical approach to identifying organic compounds using an oscillating plasma glow discharge detector for gas chromatography

Creator:: Smith, Diane Lynn
Abstract:: An oscillating plasma glow discharge detector for gas chromatography is used to obtain fingerprint information about an analyte by combining both the average cell current and oscillation frequency signals. Five homologs each of the n-alkanes, 1-alkenes, 1-alkynes, 2-ketones and aldehydes are studied. Although triplicate determinations had some scatter due to...
Resource Type:: Dissertation
Full Text:: each data point in the peak. Once data processing is complete, a report is generated for each

The development of a high spectral-resolution laser-excited molecular fluorescence system and its application to gas chromatography and the determination of polynuclear aromatic hydrocarbons

Creator:: Hein, Scott J.
Abstract:: A high-spectral resolution laser-excited molecular fluorescence system was developed that utilizes a pulsed supersonic expansion to simplify the fluorescence excitation spectra of large, gas-phase aromatic molecules diluted in an excess of a monatomic gas. A microcomputer was used to control and synchronize the instrumental components, which included a Chromatix CMX-4...
Resource Type:: Dissertation
Full Text:: calibration 154 program CMX4CAL. 11.37 Sample wavelength calibration report for a 159 CMX-4 etalon scan of

A quadratic programming routine for the statistical analysis of gas chromatographic data

Creator:: Elliott, Stanley Claud, Jr
Abstract:: A quadratic programming method was developed for the statistical analysis of gas chromatographic data. The method was applied to three types of flavor extracts, peppermint, hops and brewed tea. The brewed tea data had to be abandoned because of the singularity of its coveriance matrix. In all cases tried the...
Resource Type:: Masters Thesis
Full Text:: A quadratic programming routine for the statistical

The obstructive factor in gas chromatography

Creator:: Thumneum, Pornpan
Abstract:: The study of the obstructive factor by Hawkes (11) showed a relation between the obstructive factor and velocity using a continuous method. Later, Bowers and Hawkes (12) developed a similar method with some improvements in the apparatus and found out that the obstructive factor was not flow dependent. This study...
Resource Type:: Masters Thesis
Full Text:: a rela- tion between the obstructive factor and velocity using a continuous method. Later, Bowers

Flame ionization detection of hydrocyanic acid ; Analysis of trace aqueous solutions

Creator:: Claeys, Robert Raymond
Abstract:: A gas chromatographic procedure was developed for the determination of nanogram quantities of hydrocyanic acid using a flame ionization detector. Excellent chromatograms were obtained on a porous polyaromatic polymer column (Porapak Q) at 60°C. The procedure was employed for the analysis of HCN in aqueous cyanide solutions. Solutions as low...
Resource Type:: Dissertation
Full Text:: approved: Professor Harry Freund A gas chromatographic procedure was developed for the de- termination

Acidity and basicity measurements of some silicone gas chromatographic liquid stationary phases

Creator:: Miller, Gary J.
Resource Type:: Masters Thesis
Full Text:: uncomplicated to use. Little or no previous experience with chromatography and stationary phases, and only a

Selective detection for gas chromatography by ultraviolet spectrometry

Creator:: Van Engelen, Debra L.
Abstract:: Spectrometric detection systems for gas chromatography (GC) based on gas phase ultraviolet absorbance and fluorescence measurements have been developed and evaluated in this research. Polynuclear aromatic compounds (PNAs) are selectively detected by these systems. Limits of detection for PNAs range from 4 ng to 90 ng for absorbance determinations, and...
Resource Type:: Dissertation
Full Text:: ; (a) scans 36-47 (3-D), (b) scans 46-47 (no time axis) 34. Absorption spectra of dibenzofuran from

Mass-flow control system utilizing flow-feedback for gas chromatography

Creator:: Dodo, Gerald Haruo
Abstract:: A unique mass-flow control system for the carrier gas in gas chromatography is described and evaluated. Carrier gas flow is controlled by a flow sensor, feedback electronics, a flow-control valve and a microcomputer. The flow-rate is monitored by a mass-flow meter by this system and the flow is adjusted in...
Resource Type:: Masters Thesis
Full Text:: Shack Hobby Board no. 276-154A. This circuit is described as a difference amplifier because it

The diffusion coefficient of propane in helium

Creator:: Tang, Fa-tai
Abstract:: A specially designed gas chromatograph with both TCD and FID has been tested for the measurement of the diffusion coefficients of methane and propane in helium. Knox's arrested elution technique(⁴) was used and yielded a value of 0.6431 cm²/sec averaged with the value obtained by Yang and Hawkes(⁷). Values of...
Resource Type:: Masters Thesis
Full Text:: column and a low density fluid are employed. In this experiment, the flow rate is no more than 3.7 cm/s

ScholarsArchive@OSU

The identification and quantitation of complex polycyclic aromatic hydrocarbon mixtures in environmental samples using comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry

A multivariate statistical approach to identifying organic compounds using an oscillating plasma glow discharge detector for gas chromatography

The development of a high spectral-resolution laser-excited molecular fluorescence system and its application to gas chromatography and the determination of polynuclear aromatic hydrocarbons

A quadratic programming routine for the statistical analysis of gas chromatographic data

The obstructive factor in gas chromatography

Flame ionization detection of hydrocyanic acid ; Analysis of trace aqueous solutions

Acidity and basicity measurements of some silicone gas chromatographic liquid stationary phases

Selective detection for gas chromatography by ultraviolet spectrometry

Mass-flow control system utilizing flow-feedback for gas chromatography

The diffusion coefficient of propane in helium

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