J W Koenig

Evaluation of the Performance and Clinical Impact of a Rapid Intraoperative Parathyroid Hormone Assay in Conjunction with Preoperative Imaging and Concise Parathyroidectomy

Lawrence R. Johnson, Gerard M. Doherty, Terry C. Lairmore et al. · Clinical Chemistry · 2001 · 80 citations · Full text

Analytic Performance of Immunoassays for Drugs of Abuse Below Established Cutoff Values

Verónica Luzzi, Al N Saunders, J W Koenig et al. · Clinical Chemistry · 2004 · 51 citations

Isotope Dilution Gas Chromatographic-Mass Spectrometric Measurement of Tricyclic Antidepressant Drugs. Utility of the 4-Carbethoxyhexafluorobutyryl Derivatives of Secondary Amines

Barbara A. Way, Douglas F. Stickle, Michael Mitchell et al. · Journal of Analytical Toxicology · 1998 · 34 citations · Full text

Potential Interference of Cyclobenzaprine and Norcyclobenzaprine with HPLC Measurement of Amitriptyline and Nortriptyline: Resolution by GC-MS Analysis

Edward C.C. Wong, J W Koenig, John Turk · Journal of Analytical Toxicology · 1995 · 31 citations

Medicinal Chemistry, Kinesiology, Pharmacological Study +12

Distinction among eight opiate drugs in urine by gas chromatography-mass spectrometry

William Nowatzke, Jianbo Zeng, Al N Saunders et al. · Journal of Pharmaceutical and Biomedical Analysis · 1999 · 27 citations

Substance Abuse, Health Sciences, Addiction +12