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:: . Shiraishi, H.; Pilkington, N. H.; Otsuki, A.; Fuwa, K., Occurrence of chlorinated polynuclear aromatic

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

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:: A multivariate statistical approach to identifying organic

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:: isolation and Shpol'skii spectroscopy, freeze the analyte in a suitable matrix at temperatures of 77 K or

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:: flow rate (F) . A - KQ F (2) where F is in units of ml/ min, Q in milligrams, K in mv/ mg/ ml

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:: (1+1(1) u k (1) 3 where ) is a factor characteristic of the packing, d is the particle

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:: switches to 1x10-1, 2x10-2 or 5x10-3* K This register sets a delay between the time that the interface

Slow processes in gas-solid chromatography

Creator:: Burns, Walter Frederick
Abstract:: Gas-solid chromatography often has asymmetrical elution peaks. This is attributed to nonlinear isotherms, multi-energy adsorption sites, and slow processes. This study utilized a stopflow gas chromatograph with various NaOH and NaCl modified aluminas as adsorbents and methane as adsorbate to determine the influence of surface area and pore volume distribution...
Resource Type:: Masters Thesis
Full Text:: Arrhenius equation k Ae(W/RT) Eq. 3 8 where K is the rate constant of the desorption process, A is the

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

Classification of stationary phases in gas chromatography

Creator:: Chong, Elee Elizabeth
Abstract:: Ultraviolet spectroscopy and dispersive solubility parameters correlated to the ratios of retention times have proven valuable in classification of gas chromatography stationary phases by the donor-acceptor properties. Iodine was directly dissolved into stationary phases and the absorption frequency shift of complexes was correlated with the carbon tetrachloride/chloroform retention ratio on...
Resource Type:: Masters Thesis
Full Text:: tetrachloride is a useful measure of the donor properties of stationary phases and that the ratio of retention

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 quadratic programming routine for the statistical analysis of gas chromatographic data

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

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

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

The diffusion coefficient of propane in helium

Slow processes in gas-solid chromatography

The obstructive factor in gas chromatography

Classification of stationary phases in gas chromatography

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