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Chemistry

Analytical chemistry

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Displaying 1976 - 2000 of 2098

Improved Analytical Methodology for the Determination of PCBs and Pesticides in Human Liver Specimens

June 1, 1988

Author(s)

Reenie M. Parris, S. N. Chesler, Stephen A. Wise

Shape Selectivity in Liquid and Gas Chromatography: Polymeric Octadecylsilane and Liquid Crystalline Stationary Phases

June 1, 1988

Author(s)

Stephen A. Wise, Lane C. Sander, H.-C.K. Chang, K. E. Markides, M. L. Lee

Determination of Polycyclic Aromatic Hydrocarbons in a Coal Tar Standard Reference Material

May 1, 1988

Author(s)

Stephen A. Wise, Bruce A. Benner Jr, G. D. Byrd, S. N. Chesler, R. E. Rebbert, Michele M. Schantz

Separation and Identification of Polycyclic Aromatic Hydrocarbons Isomers of Molecular Weight 302 in Complex Mixtures

April 1, 1988

Author(s)

Stephen A. Wise, Bruce A. Benner Jr, H Liu, G. D. Byrd, A. L. Colmsjo

A Thermodynamic Comparison of Monomeric and Polymeric C18 Bonded Phases Using Aqueous Methanol and Acetonitrile Mobile Phases

March 1, 1988

Author(s)

A. M. Stalcup, D. E. Martire, Stephen Wise

Determination of Column Selectivity Toward Polycyclic Aromatic Hydrocarbons

March 1, 1988

Author(s)

Lane C. Sander, Stephen A. Wise

Determination of Nitro-PAH in Air and Particulate Matter Using HPLC with Electrochemical and Fluorescence Detection

February 1, 1988

Author(s)

William A. MacCrehan, Willie E. May, Bruce A. Benner Jr, S. Yang

Identification and Comparison of Low Molecular Weight Neutral Constituents in Two Different Coal Extracts

January 1, 1988

Author(s)

H.-C.K. Chang, M Nishioka, K. D. Bartle, Stephen Wise, J M. Bayona, K E. Markides, M. L. Lee

Optimization of Secondary Chemical Equilibria in Liquid Chromatography (SCE-LC): Variables Influencing the Self-Selectivity, Retention, and Efficiency in Acid-Base Systems

December 1, 1987

Author(s)

J Foley, Willie E. May

Optimization of Secondary Chemical Equilibria in Liquid Chromatography: Theory and Verification

December 1, 1987

Author(s)

J Foley, Willie E. May

Recent Advances in Bonded Phases for Liquid Chromatography

October 1, 1987

Author(s)

Lane C. Sander, Stephen A. Wise

Determination of the position of substituents in alkylthiophens by reaction gas chromatography-mass spectrometry

September 29, 1987

Author(s)

Anzor Mikaia, Vladimir G. Zaikin

A GC-MS method is developed for structure elucidation of thiophens. The method includes the use of a hydrodesulfuration microreactor in the inlet system of a GC-MS system and the use of hydrogen as a gas carrier and reagent.

Effect of Phase Length on Column Selectivity for the Separation of Polycyclic Aromatic Hydrocarbons in Reversed-Phase Liquid Chromatography

September 1, 1987

Author(s)

Lane C. Sander, Stephen A. Wise

Identification of Mutagenic Methylbenz[a]anthracene and Methylchrysene Isomers in Natural Samples by Liquid Chromatography and Shpol'skii Spectroscopy

July 1, 1987

Author(s)

P. Garrigues, M P. Marniesse, Stephen Wise, J. Bellocq, M Ewald

Simple Method for the Determination of alpha-Tocopherol and gamma-Tocopherol in Some Oils and in Vitamin E Capsules by HPLC

March 1, 1987

Author(s)

A A. Moustafa, E M. Abdelmoety, Stephen Wise

Characterization of the Polycyclic Aromatic Hydrocarbons from Two Standard Reference Material Air Particulate Samples

December 1, 1986

Author(s)

Stephen A. Wise, Bruce A. Benner Jr, S. N. Chesler, L.R. Hilpert, C R. Vogt, Willie E. May

Investigations of Selectivity in Reversed-Phase Liquid Chromatography on Chemically Bonded C18 Phases

December 1, 1986

Author(s)

Stephen A. Wise, Lane C. Sander, Willie E. May

Reaction chromate-spectrometry in the series of 1-aryl-2-(2-furyl)cyclopropanes.

November 1, 1986

Author(s)

Anzor Mikaia, Vladimir G. Zaikin, Mark Tsodikov

A GC-MS method is developed for the study of aryl(furyl)cyclopropanes. The method includes the use of a gas-phase hydrogenation in a pulse microreactor with Pd/porous glass at the inlet system of a GC-MS.

Cryo-Temperature Fluorescence Spectroscopy of Polynuclear Aromatic Hydrocarbons of Molecular Weight 302

September 1, 1986

Author(s)

A. L. Colmsjo, Stephen Wise

Investigation of stereoisomers of 4-alkenyl-trans-decahydroquinol-4-ols in mixtures by the method of reaction chromato-mass spectrometry

September 1, 1986

Author(s)

Anzor Mikaia, Vladimir G. Zaikin, Rosa Ushakova, Lyudmila Ukhova, NF Marchenko

A "reaction gas chromatography/mass spectrometry" method for determination structures of stereo- isomers within mixtures is developed. On-line hydrogenation is applied to 4-vinyl-trans- decahydroquinol-4-ols.

Investigations of Selectivity in Reversed-Phase Liquid Chromatography of Polycyclic Aromatic Hydrocarbons

June 1, 1986

Author(s)

Lane C. Sander, Stephen A. Wise

Recent Advances in the Characterization of Bonded Phases

June 1, 1986

Author(s)

Lane C. Sander, Charles J. Glinka, Stephen A. Wise

The Analysis of Polycyclic Aromatic Hydrocarbon Minerals Curtisite and Idrialite by High Resolution Gas and Liquid Chromatographic Techniques

June 1, 1986

Author(s)

W. R. West, Stephen Wise, R, M. Campbell, K. D. Bartle, M. L. Lee

Determination of Genotoxic Polycyclic Aromatic Hydrocarbons in a Sediment from the Black River

May 1, 1986

Author(s)

W. R. West, P A. Smith, G. M. Booth, Stephen Wise, M. L. Lee

Mass spectrometric study of 1,2,4- and 1,3,4-oxadiazoles containing indole substituents.

April 1, 1986

Author(s)

Anzor Mikaia, Rosa Ushakova, Vladimir G. Zaikin, VI Kelarev, GA Shveikhgeimer

Under electron ionization major fragmentation pathways for indolyloxadiazoles proceed via cleavage of C-O, C-N and N-O bonds in the oxadiazole ring. Skeletal rearrangements due to a migration of aryl groups are detected for diaryl1,3,4-oxadiazoles.

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