Glenn Petzinger

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

Hydrochlorothiazide–formaldehyde Adduct Impurity, Hydrochlorothiazide Drug Substance, Medicinal Chemistry +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

Separation Science, Gas Chromatography, Medicine +12

Application of mass spectrometry in the regulatory analysis of pesticides and industrial chemicals in food and feed commodities

Thomas Cairns, Emil G. Siegmund, Robert A. Jacobson et al. · Journal of Mass Spectrometry · 1983 · 24 citations

Food Forensics, Engineering, Pesticide-residue Analysis +24

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

Biochemistry, Methoxsalen Drug Substance, Medicine +13

Identification of the herbicide 2,4,6-trichlorophenyl p4-nitrophenyl ether in imported rainbow trout

Fred M Gretch, Thomas L. Barry, Glenn Petzinger et al. · Bulletin of Environmental Contamination and Toxicology · 1979 · 10 citations

Rainbow Trout, Environmental Chemistry, Pesticide-residue Analysis +8