Gordon J. Nelson

Assessing analytical specificity in quantitative analysis using tandem mass spectrometry

Mark M. Kushnir, Alan L. Rockwood, Gordon J. Nelson et al. · Clinical Biochemistry · 2005 · 152 citations

Natural Sciences, Chemistry, Analytical Chemistry +15

Simultaneous Determination of Codeine, Morphine, Hydrocodone, Hydromorphone, Oxycodone, and 6-Acetylmorphine in Urine, Serum, Plasma, Whole Blood, and Meconium by LC-MS-MS

Rebecka Coles, Mark M. Kushnir, Gordon J. Nelson et al. · Journal of Analytical Toxicology · 2007 · 114 citations · Full text

Pharmacy, Pharmaceutical Analysis, Pharmacology +17

Liquid Chromatography–Tandem Mass Spectrometry Analysis of Urinary Free Cortisol

Mark M. Kushnir, Alan L. Rockwood, Gordon J. Nelson et al. · Clinical Chemistry · 2003 · 71 citations · Full text

Pharmacy, Biochemistry, Endocrinology +17

Pseudo-Cushing Syndrome Caused by Fenofibrate Interference with Urinary Cortisol Assayed by High-Performance Liquid Chromatography

A.W. Meikle, James W. Findling, Mark M. Kushnir et al. · The Journal of Clinical Endocrinology & Metabolism · 2003 · 63 citations · Full text

Medicine, Endocrinology, Pharmacology +14

Nitrite Adulteration of Workplace Urine Drug-Testing Specimens I. Sources and Associated Concentrations of Nitrite in Urine and Distinction Between Natural Sources and Adulteration

Francis M. Urry, Gabor Komaromy-Hiller, Brian Staley et al. · Journal of Analytical Toxicology · 1998 · 60 citations · Full text

Pharmacy, Toxicology, Analytical Toxicology +12