Samuel R. Gratz

Capillary Electrophoretic Application of 1-Alkyl-3-methylimidazolium-Based Ionic Liquids

Enrique G. Yanes, Samuel R. Gratz, Michael J. Baldwin et al. · Analytical Chemistry · 2001 · 315 citations

Natural Sciences, Chemical Engineering, Chemistry +17

Analysis of undeclared synthetic phosphodiesterase-5 inhibitors in dietary supplements and herbal matrices by LC–ESI–MS and LC–UV

Samuel R. Gratz, Cheryl L. Flurer, Karen A. Wolnik · Journal of Pharmaceutical and Biomedical Analysis · 2004 · 176 citations

Pharmacy, Medicinal Chemistry, Pharmacology +12

Enantiomeric Separations of Terbutaline by CE with a Sulfated β-Cyclodextrin Chiral Selector:  A Quantitative Binding Study

Samuel R. Gratz, Apryll M. Stalcup · Analytical Chemistry · 1998 · 99 citations

Pharmacy, Chemistry, Pharmaceutical Analysis +17

Accurate mass measurement using Fourier transform ion cyclotron resonance mass spectrometry for structure elucidation of designer drug analogs of tadalafil, vardenafil and sildenafil in herbal and pharmaceutical matrices

Samuel R. Gratz, Bryan M. Gamble, Rick A. Flurer · Rapid Communications in Mass Spectrometry · 2006 · 94 citations · Full text

Pharmacy, Medicinal Chemistry, Pharmacology +16

Tetraethylammonium tetrafluoroborate: a novel electrolyte with a unique role in the capillary electrophoretic separation of polyphenols found in grape seed extracts

Enrique G. Yanes, Samuel R. Gratz, Apryll M. Stalcup · The Analyst · 2000 · 80 citations

Agriculture, Biochemistry, Food Science +14