Author

William A. Joern

Observed names: W A Joern, William A Joern

Observed institution: University of Minnesota

OpenAlex ID: A5057238301

Detection of Past and Recurrent Marijuana Use By a Modified GC/MS Procedure

1987 · William A. Joern · Journal of Analytical Toxicology · 40

Confirmation of Low Concentrations of Urinary Benzodiazepines, Including Alprazolam and Triazolam, by GC/MS: An Extractive Alkylation Procedure

1992 · William A. Joern · Journal of Analytical Toxicology · 35

Surface Adsorption of the Urinary Marijuana Carboxy Metabolite: The Problem and a Partial Solution

1992 · William A. Joern · Journal of Analytical Toxicology · 19

Detection of Alprazolam (Xanax) and Its Metabolites in Urine Using Dual Capillary Column, Dual Nitrogen Detector Gas Chromatography

1987 · William A. Joern, Ann B. Joern · Journal of Analytical Toxicology · 17

Routine Detection of Benzolyecgonine in Urine at a Sensitivity of 35 ng/mL by a Combination of EMIT and Gas Chromatography/Mass Spectrometry

1987 · William A. Joern · Journal of Analytical Toxicology · 17

Marijuana Testing in Urine: Use of a Hexadeuterated Internal Standard for Extended Linearity, and Ion Trap vs Mass Selective Detector Gas Chromatograph/Mass Spectrometer Systems

1992 · W A Joern · Clinical Chemistry · 11

GC/MS Assay of the Marijuana Carboxy Metabolite: Urine Interference With the Dimethyl Derivative

1992 · William A Joern · Journal of Analytical Toxicology · 11

Further Observations: False Negative EMIT Cannabinoids

1989 · William A. Joern · Journal of Analytical Toxicology · 7

Rearrangements of 5-nitronorbornenes. II. 6-Phenyl- and 6-methyl-5-nitro-2-norbornenes

1969 · Wayland E. Noland, Richard B. Hart, et al. · The Journal of Organic Chemistry · 7

Unexpected Volatility of Barbiturate Derivatives: An Extractive Alkylation Procedure for Barbiturates and Benzoylecgonine

1994 · William A. Joern · Journal of Analytical Toxicology · 6

Micro-scale extractive alkylation procedure for the gas-chromatographic measurement of theophylline in serum and saliva, with use of a nitrogen detector.

1978 · W A Joern · Clinical Chemistry · 6

Reaction between chromous ion and acetylene-dicarboxylic acid. Nature and reactions of intermediate species

1968 · Rudolph S. Bottei, William A. Joern · Journal of the American Chemical Society · 6

Ion Ratio Instability of a GC/MS System is Related to Fluctuations in Room Air Flow

1993 · William A. Joern · Journal of Analytical Toxicology · 3

Microcomputer program for generating Beckman ASTRA-8 reports.

1982 · W A Joern, G N Krumrey · Clinical Chemistry · 1

Englomerate salts and their use as analytical reagents

1972 · Jack L. Lambert, William A. Joern · Journal of Chemical Education · 1

Ionization constants of acetylenedicarboxylic acid

1968 · Rudolph S. Bottei, William A. Joern · Journal of Chemical & Engineering Data · 1

Urinary protein measurement by the Coomassie Blue dye-binding method adapted to the ABA-100 Bichromatic Analyzer.

1981 · W A Joern, L Schmoele · Clinical Chemistry

Microcomputer program for RIA data reduction and other laboratory calculations.

1981 · W A Joern · Clinical Chemistry

Works count: 18

Citation count: 188

H-index: 7

I10-index: 7