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Dive into the research topics where James J. Sullivan is active.

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Featured researches published by James J. Sullivan.


Pure and Applied Chemistry | 1996

ALLIUM CHEMISTRY : NATURAL ABUNDANCE OF ORGANOSELENIUM COMPOUNDS FROM GARLIC, ONION AND RELATED PLANTS AND IN HUMAN GARLIC BREATH

Eric Block; Xiao-Jia Cai; Peter C. Uden; Xing Zhang; Bruce D. Quimby; James J. Sullivan

By using the technique of gas chromatography with atomic emission detection (GC-AED), a variety of low molecular weight organoselenium and mixed organosulfur-organoselenium compounds have been identified in natural abundance in the headspace above chopped AZZium and Brussicu spp. and in human breath after ingestion of garlic. Selenoamino acid precursors to these organoselenium volatiles have been identified in these plants using the same


Journal of Chromatography A | 1973

Approximation of electron capture response factors for highly electrophilic compounds

James J. Sullivan

Abstract A theoretical upper limit of electron attachment rate constants is derived, based on collision-limited electron interaction with polarizable molecules. This limit is shown to give upper limits for electron capture response factors. Evidence is presented showing that this limit is approached to within a factor of two for a wide variety of highly electrophilic compounds. It is suggested that this limit can be used as an approximation for electron capture response factors for suitable compounds, and that properly chosen derivatizing reagents may allow detection of derivatives with fairly accurate prediction of response factors.


Analytical Proceedings | 1994

Headspace–gas chromatography with atomic emission and mass selective detection for the determination of organoselenium compounds in elephant garlic

Xiao-Jia Cai; Peter C. Uden; James J. Sullivan; Bruce D. Quimby; Eric Block

A novel inlet headspace sampler interfaced with gas chromatography was used to determine trace levels of volatile organoselenium compounds in garlic flavorants. Volatiles from crushed garlic were detected by atomic plasma emission and mass spectroscopy.


Analytical Chemistry | 1990

Evaluation of a microwave cavity, discharge tube, and gas flow system for combined gas chromatography-atomic emission detection

Bruce D. Quimby; James J. Sullivan


Journal of Agricultural and Food Chemistry | 1995

Allium Chemistry: Identification of Selenoamino Acids in Ordinary and Selenium-Enriched Garlic, Onion, and Broccoli Using Gas Chromatography with Atomic Emission Detection

Xiao-Jia Cai; Eric Block; Peter C. Uden; Xing Zhang; Bruce D. Quimby; James J. Sullivan


Analytical Chemistry | 1990

Characterization of a Computerized Photodiode Array Spectrometer for Gas Chromatography-Atomic Emission Spectrometry

James J. Sullivan; Bruce D. Quimby


Journal of Agricultural and Food Chemistry | 1995

Allium chemistry : identification of natural abundance organoselenium compounds in human breath after ingestion of garlic using gas chromatography with atomic emission detection

Xiao-Jia Cai; Eric Block; Peter C. Uden; Bruce D. Quimby; James J. Sullivan


Journal of Agricultural and Food Chemistry | 1994

Allium chemistry: identification of natural abundance organoselenium volatiles from garlic, elephant garlic, onion, and Chinese chive using headspace gas chromatography with atomic emission detection

Xiao-Jia Cai; Peter C. Uden; Eric Block; Xing Zhang; Bruce D. Quimby; James J. Sullivan


Hrc-journal of High Resolution Chromatography | 1989

Detection of C, H, N, and O in capillary gas chromatography by atomic emission

James J. Sullivan; Bruce D. Quimby


Hrc-journal of High Resolution Chromatography | 1990

An investigation of gas chromatography with atomic emission detection for the determination of empirical formulas

Philip L. Wylie; James J. Sullivan; Bruce D. Quimby

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Eric Block

State University of New York System

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Peter C. Uden

University of Massachusetts Amherst

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