Index Catalog // ScholarsArchive@OSU

A new general method for the optimization of HPLC ternary of pseudo-quaternary mobile phases and the separation of two new metabolites of nefopam from greyhound urine

Creator:: Chen, Hsiao and Chen, Xiao
Abstract:: A new general method is developed for the optimization of HPLC ternary or pseudo-quaternary mobile phases which are represented by the trilinear coordinate system. This method can predict the global optimum of the mobile phase composition. The global optimum composition along each edge of the triangle and the corresponding selectivity...
Resource Type:: Dissertation
Full Text:: FOR 87 OPTIMIZING THE MOBILE PHASE COMPOSITION IN LIQUID CHROMATOGRAPHY Abstract 88 Introduction 89

Anthocyanin composition of red raspberry juice : influences of variety, processing, and environmental factors

Creator:: Boyles, Matthew J.
Resource Type:: Masters Thesis
Full Text:: Abstract approved: . _, Dr. Ronald E. Wrolstad Two HPLC (High Pressure Liquid Chromatography

Comparison and optimization of chromatographic conditions for separation of cyclic dynorphin A analogues from linear byproducts

Creator:: Leelasvatanakij, Leena
Resource Type:: Masters Thesis
Full Text:: performance liquid chromatography (HPLC), reverse phase (RPC) and ion-exchange (IEC) chromatography, were

Development and broad application of a mass spectrometry based metabolomics platform

Creator:: Kirkwood, Jay Steven
Abstract:: Metabolomics is a comprehensive analysis of small molecules, or metabolites, in a system. Metabolomics is a hypothesis-generating experiment and offers an unbiased analysis of cell metabolism that can aid in the understanding of fundamental biological processes. Metabolomics is widely and broadly applicable in the biological sciences and has been used...
Resource Type:: Dissertation
Full Text:: ), this protocol describes a high-pressure liquid chromatography–coupled to mass spectrometry (LC-MS

High performance liquid chromatography of the staphylococcal enterotoxins

Creator:: Williams, Robert Roy
Abstract:: Many methods in use today for the isolation, purification, and identification of the staphylococcal enterotoxins involve lengthy steps with significant loss of enterotoxin, are subject to interference from contaminating sample components, and lack sufficient specificity. Culture extracts of enterotoxin producing Staphylococcus aureus strains (enterotoxins A-E), crude enterotoxin preparations (enterotoxins A-E),...
Resource Type:: Dissertation
Full Text:: High performance liquid chromatography of the

Large volume (1,800 µL) injection HPLC/MS/MS for the quantitative determination of illicit drugs and human urinary biomarkers in municipal wastewater

Creator:: Chiaia Hernandez, Aurea C.
Abstract:: A sensitive, selective, rapid analytical method based on large-volume injection (LVI) liquid chromatography/ tandem mass spectrometry was developed using commercially-available hardware that eliminates the need for either off-line or on-line solid phase extraction. Centrifugation followed by the direct injection of 1,800 µL was used for the quantification of illicit drugs,...
Resource Type:: Masters Thesis
Full Text:: ) liquid chromatography/ tandem mass spectrometry was developed using commercially-available hardware

Monolithic sorbents for microscale separations

Creator:: Doneanu, Angela
Abstract:: Over the last decade, the miniaturization of analytical systems has become an increasingly important and interesting research area. Miniaturized systems offer many advantages, including reduced reagent and sample consumption, shorter analysis times, portability and disposability. This dissertation describes novel approaches in this direction, focusing on two areas: the miniaturization of...
Resource Type:: Dissertation
Full Text:: capillary columns for liquid chromatography and capillary electrochromatography were prepared within the

Novel approaches to enhancing selectivity and efficiency in microscale liquid chromatography

Creator:: Vallano, Patrick T.
Abstract:: For a number of reasons, miniaturization of chromatographic columns has been a general trend over the past three decades. Methods designed to enhance selectivity and efficiency can offer improved separation power and speed, expanding on the advantages of miniaturized columns. This dissertation describes novel approaches in this direction, focusing on...
Resource Type:: Dissertation
Full Text:: microscale liquid chromatography AN ABSTRACT OF THE DISSERTATION OF Patrick T. Vallano for the degree of

Novel monolithic columns for microscale liquid chromatography and capillary electrochromatography

Creator:: Chirica, Gabriela S.
Abstract:: The challenges prompted by miniaturization of chromatographic systems have led scientists to explore new avenues in the synthesis of stationary phases. Packed capillary columns have found limited application in routine analysis due to a number of technical difficulties, most of which are attributable to the frits. New column designs insure...
Resource Type:: Dissertation
Full Text:: Novel Monolithic Columns for Microscope Liquid Chromatography

The distribution of organic bases in reverse phase liquid chromatography : a study of mechanisms

Creator:: Jayasinghe, Dudley Shelton
Abstract:: The distribution of hydrophobic ionogenic organic compounds (HIOC's) between aqueous and nonaqueous phases has been investigated. The HIOC's are aniline and methyl substituted anilines. The aqueous phases are methanol-water mixed solvents with varying pH and ionic strength. The nonaqueous phases are silica and alkyl derivatized silica with ethyl- (C-2), octyl-...
Resource Type:: Dissertation
Full Text:: ORGANIC BASES IN REVERSE PHASE LIQUID CHROMATOGRAPHY: A STUDY OF MECHANISMS Abstract approved: Redacted

ScholarsArchive@OSU

A new general method for the optimization of HPLC ternary of pseudo-quaternary mobile phases and the separation of two new metabolites of nefopam from greyhound urine

Anthocyanin composition of red raspberry juice : influences of variety, processing, and environmental factors

Comparison and optimization of chromatographic conditions for separation of cyclic dynorphin A analogues from linear byproducts

Development and broad application of a mass spectrometry based metabolomics platform

High performance liquid chromatography of the staphylococcal enterotoxins

Large volume (1,800 µL) injection HPLC/MS/MS for the quantitative determination of illicit drugs and human urinary biomarkers in municipal wastewater

Monolithic sorbents for microscale separations

Novel approaches to enhancing selectivity and efficiency in microscale liquid chromatography

Novel monolithic columns for microscale liquid chromatography and capillary electrochromatography

The distribution of organic bases in reverse phase liquid chromatography : a study of mechanisms

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