Concepedia

Gary J Lehr

GJ

5

Publications

91

Citations

5

H-Index

1991

Active since

Affiliations

United States Food and Drug Administration(Current)

Gary J Lehr is an author at United States Food and Drug Administration specializing in analytical chemistry, mass spectrometry, and drug analysis.

Top concepts

Publications per year

1991–2003

5

Publications

5

Isolation of a 2:1 hydrochlorothiazide–formaldehyde adduct impurity in hydrochlorothiazide drug substance by preparative chromatography and characterization by electrospray ionization LC–MS

John D Franolic, Gary J Lehr, Thomas L. Barry et al. · Journal of Pharmaceutical and Biomedical Analysis · 2001 · 27 citations

, , +13

Isolation and identification of process impurities in trimethoprim drug substance by high-performance liquid chromatography, atmospheric pressure chemical ionization liquid chromatography/mass spectrometry and nuclear magnetic resonance spectroscopy

Gary J Lehr, Thomas L. Barry, Glenn Petzinger et al. · Journal of Pharmaceutical and Biomedical Analysis · 1999 · 25 citations

, , +12

LC determination of impurities in methoxsalen drug substance: isolation and identification of isopimpinellin as a major impurity by atmospheric pressure chemical ionization LC/MS and NMR

Gary J Lehr, Thomas L. Barry, John D Franolic et al. · Journal of Pharmaceutical and Biomedical Analysis · 2003 · 19 citations

, , +13

Liquid Chromatographic Determination of Clidinium Bromide and Clidinium Bromide-Chlordiazepoxide Hydrochloride Combinations in Capsules

Stella M Yuen, Gary J Lehr · Journal of AOAC INTERNATIONAL · 1991 · 10 citations

Determination of Diphenoxylate Hydrochloride and Atropine Sulfate in Combination Drug Formulations by Liquid Chromatography

Gary J Lehr · Journal of AOAC International · 1996 · 10 citations

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