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Chemistry

Analytical chemistry

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Displaying 2001 - 2025 of 2111

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.

Characterization of Polycyclic Aromatic Minerals Curtisite, Idrialite, and Pendletonite Using Liquid Chromatography, Gas Chromatography, Mass Spectrometry, and Nuclear Magnetic Resonance Spectroscopy

March 1, 1986

Author(s)

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

Silylation of carbonyl compounds in a chromate-mass spectrometer column

March 1, 1986

Author(s)

Anzor Mikaia, Alexey Yatsenko, Leonid S. Glebov, Vladimir G. Zaikin

General and specific fragmentation pathways of trimethylsilyl derivatives of ketones and aldehydes under electron ionization are determined. The derivatives are obtained as a result of on-column silylation.

Chemical methods in organic mass spectrometry

January 1, 1986

Author(s)

Anzor Mikaia, Vladimir G. Zaikin

The book describes various derivatization approaches employed prior GC-MS experiments for structure elucidation of organic compounds.

Mass Spectrometry of Organic Compounds

January 1, 1986

Author(s)

Anzor Mikaia, Vladimir G. Zaikin, Nikolai Vul'fson

Tutorial book on mass spectrometry, instrumentation and mainly fragmentation of organic compounds.

Characterization of Polycyclic Aromatic Hydrocarbon Mixtures from Air Particulate Samples Using Liquid Chromatography, Gas Chromatography and Mass Spectrometry

December 1, 1985

Author(s)

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

Deuteration in a chromato-mass spectrometry inlet system in a study of fragmentation mechanisms of cyclobutane hydrocarbons

October 1, 1985

Author(s)

Anzor Mikaia, Gregory Romanov, Vladimir G. Zaikin, Valentin Vdovin

All major fragmentation mechanisms of cyclobutene hydrocarbons are determined by the analysis of their electron ionization mass spectra and spectra of their selectively deuterated analogs.