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Search Publications by: Katherine E. Sharpless (Fed)

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Displaying 151 - 175 of 257

Characterization of a Suite of Ginkgo-Containing Standard Reference Materials

September 1, 2007
Author(s)
Catherine A. Rimmer, S. Howerton, Katherine E. Sharpless, Lane C. Sander, Stephen E. Long, Karen E. Murphy, Barbara J. Porter, K. Putzbach, M. S. Rearick, Stephen A. Wise, Laura J. Wood, Rolf L. Zeisler, Diane K. Hancock, James H. Yen, J. M. Betz, A. NguyenPho, L. Yang, C. Scriver, S. N. Willie, R. Sturgeon, B. Schaneberg, C. Nelson, J. Skamarack, M. Pan, L. Kerri, D. Gray, E. H. Waysek, A. Blatter, E. Reich

Determination of Bitter Orange Alkaloids in Dietary Supplements Standard Reference Materials by Liquid Chromatography With Ultraviolet Absorbance and Fluorescence Detection

April 24, 2007
Author(s)
Karsten Putzbach, Katherine E. Sharpless, Lane C. Sander
Four adrenergic amines [(+/-) synephrine, (+/-) octopamine, tyramine, and n-methyltyramine) were determined in a variety of Citrus aurantium (Bitter Orange) containing dietary supplements. Two extraction techniques were evaluated in detail: Soxhlet

Determination of Caffeine, and Caffeine-Related Metabolites in Ephedra-Containing Standard Reference Materials Using Liquid Chromatography With Absorbance Detection and Tandem Mass Spectrometry

April 24, 2007
Author(s)
Jeanice M. Brown Thomas, Katherine E. Sharpless, S. Mitvalsky, Mark Roman, James H. Yen, Mary B. Satterfield
The concentration of caffeine and caffeine-related compounds in two ephedra-containing reference materials have been determined by three independent methods with measurements performed by the National Institute of Standards and Technology (NIST) and a

Preparation and Characterization of a Suite of Ephedra-Containing Standard Reference Materials

November 1, 2006
Author(s)
Katherine E. Sharpless, David L. Anderson, Therese A. Butler, J. M. Betz, Douglas A. Howell, S. G. Capar, J. Cheng, C. Fraser, G. Gardner, T. Ihara, J. W. Lam, Stephen E. Long, Elizabeth A. Mackey, M. McCooeye, Karen E. Murphy, W. R. Mindak, S. Mitvalsky, Karen W. Phinney, Barbara J. Porter, A. NguyenPho, Lane C. Sander, M. C. Roman, Mary B. Satterfield, Jeanice M. Brown Thomas, C. Scriver, R. E. Sturgeon, Robert D. Vocke Jr., Stephen A. Wise, Laura J. Wood, James H. Yen, L. Yang, G. C. Ziobro