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Search Publications by: Katherine E. Sharpless (Fed)

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Displaying 51 - 75 of 129

Certification of Vitamins and Carotenoids in SRM 3280 Multivitamin/Multielement Tablets

April 24, 2011
Author(s)
Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise, Bryant C. Nelson, Karen W. Phinney, Barbara J. Porter, Catherine A. Rimmer, Jeanice M. Brown Thomas, Laura J. Wood, James H. Yen, David L. Duewer, R. Atkinson, R. Chen, R. Goldschmidt, W.R. Wolf, I-P Ho, M. Betz
A new multivitamin/multielement dietary supplement Standard Reference Material (SRM) has been issued by the National Institute of Standards and Technology (NIST) with certified and reference concentration values for 13 vitamins, 24 elements, and two

Preparation and Characterization of Standard Reference Material 1849 Infant/Adult Nutritional Formula

July 1, 2010
Author(s)
Katherine E. Sharpless, Richard M. Lindstrom, Bryant C. Nelson, Karen W. Phinney, Catherine A. Rimmer, Lane C. Sander, Michele M. Schantz, Rabia Oflaz, Jeanice M. Brown Thomas, Gregory C. Turk, Stephen A. Wise, Laura J. Wood, James H. Yen
Standard Reference Material (SRM) 1849 Infant/Adult Nutritional Formula has been issued by the National Institute of Standards and Technology (NIST) as a replacement for SRM 1846 Infant Formula, which was issued in 1996. Extraction characteristics of SRM

Determination of Organic Acids in Vaccinium Berry Standard Reference Materials

June 27, 2010
Author(s)
Melissa M. Phillips, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise, Catherine A. Rimmer, Ryan Case, James H. Yen
Nine organic acids (citric acid, galacturonic acid, glycolic acid, isocitric acid, malic acid, oxalic acid, quinic acid, shikimic acid, and tartaric acid) and two anions (phosphate and sulfate) were determined in a suite of Vaccinium berry containing

Quality Focus: Certified Reference Materials

June 1, 2010
Author(s)
Katherine E. Sharpless
In June of this year, the final stage of the staggered implementation of current Good Manufacturing Practices (cGMPs) took effect, requiring all domestic and foreign companies that manufacture, package, label, or hold dietary supplements to comply with its

Standard Reference Materials for Analysis of Dietary Supplements

June 1, 2010
Author(s)
Katherine E. Sharpless, David L. Duewer
NIST, in collaboration with the National Institutes of Health Office of Dietary Supplements (NIH-ODS) and the Food and Drug Administration (FDA) is producing Standard Reference Materials (SRMs) for dietary supplements. This paper describes the how these

An LC-ESI/MS Method for Determining Theanine in Green Tea Dietary Supplements

April 28, 2010
Author(s)
Mary Bedner, Lane C. Sander, Katherine E. Sharpless
Theanine is the major amino acid present in Camellia sinensis, or green tea. A method for determining theanine in its native state using liquid chromatography with positive-mode electrospray ionization mass spectrometric detection was developed

CCQM–K62: Nutrients in Infant/Adult Formula – Vitamins

April 24, 2010
Author(s)
Katherine E. Sharpless, Catherine A. Rimmer, Karen W. Phinney, Bryant C. Nelson, David L. Duewer, Stephen A. Wise
Key Comparison CCQM-K62 was designed to enable demonstration of the equivalence in capabilities for measurement of vitamins in a food matrix. A milk-based fortified human infant/adult formula was selected as the matrix based upon material availability and

CCQM–K62: Nutrients in Infant/Adult Formula – Vitamins: Final Report

April 24, 2010
Author(s)
Katherine E. Sharpless, Catherine A. Rimmer, Karen W. Phinney, Bryant C. Nelson, David L. Duewer, Stephen A. Wise
Key Comparison CCQM-K62 was designed to enable demonstration of the equivalence in capabilities for measurement of vitamins in a food matrix. A milk-based fortified human infant/adult formula was selected as the matrix based upon material availability and

Dietary Supplement Standard Reference Materials

October 1, 2009
Author(s)
Lane C. Sander, Karen W. Phinney, Michele M. Schantz, Katherine E. Sharpless, Stephen A. Wise
In 1994, the U.S. Congress enacted the Dietary Supplement Health and Education Act to "protect the right of access of consumers to safe dietary supplements". In response to this legislation, the National Institute of Standards and Technology (NIST), the

Demonstrating the Comparability of Certified Reference Materials

July 24, 2009
Author(s)
David L. Duewer, Katrice A. Lippa, Stephen E. Long, Karen E. Murphy, Katherine E. Sharpless, Lorna T. Sniegoski, Michael J. Welch
Certified Reference Materials (CRMs) enable the meaningful comparison of measurement results over time and place. When CRMs are used to calibrate or verify the performance of a measurement system, results produced by that system can be related through the

Standard Reference Materials to Support Measurement of Fatty Acids

April 7, 2009
Author(s)
Lane C. Sander, Michele M. Schantz, Katherine E. Sharpless, Stephen A. Wise
The National Institute of Standards and Technology offers a variety of natural-matrix and solution-based Standard Reference Materials (SRMs) that are characterized for fatty acid composition. The natural-matrix SRMs are intended primarily for use as

Fish-Related Standard Reference Materials

February 1, 2009
Author(s)
Michele M. Schantz, Steven J. Christopher, William C. Davis, Russell D. Day, Jennifer M. Lynch, John R. Kucklick, Stephen E. Long, Elizabeth A. Mackey, Barbara J. Porter, Dianne L. Poster, Katherine E. Sharpless, Gregory C. Turk, Stephen A. Wise
The National Institute of Standards and Technology (NIST) has developed four Standard Reference Materials (SRMs) related to the monitoring of contaminants in fish and marine mammals: SRM 1588b Organics in Cod Liver Oil, SRM 1945 Organics in Whale Blubber

Certification of Standard Reference Materials for Bitter Orange

July 1, 2008
Author(s)
Lane C. Sander, K. Putzbach, Bryant C. Nelson, Catherine A. Rimmer, Mary Bedner, Jeanice M. Brown Thomas, Barbara J. Porter, Laura J. Wood, Michele M. Schantz, Karen E. Murphy, Katherine E. Sharpless, Stephen A. Wise, James H. Yen, P. H. Siitonen, R. I. Evans, A. NguyenPho, M. C. Roman, J. M. Betz

Progress in Developing Dietary Supplement Databases: Analytically Validated Dietary Supplement Ingredient Database (DSID) and Dietary Supplement Label Database (DSLD) at NIH s Office of Dietary Supplements

April 24, 2008
Author(s)
J T. Dwyer, Mary F. Picciano, J. M. Betz, Kenneth D. Fisher, L G. Saldanha, Elizabeth A. Yetley, Paul M. Coates, John A. Milner, Jackie Whitted, Vicki Burt, K Radimer, Jaimie Wilger, Katherine E. Sharpless, Joanne M. Holden, K W. Andrews, Janet M. Roseland, Cuiwei Zhao, Amy Schweitzer, J Harnly, W Wolf, C R. Perry
Although an estimated 50% of US adults consume dietary supplements, analytically substantiated data on their bioactive constituents are sparse. Several programs funded by the Office of Dietary Supplements (ODS) at the National Institutes of Health enhance

USDA Dietary Supplement Ingredient Database (DSID): Preliminary Research Studies Address Basic Questions for Adult Multivitamin/Minerals

April 24, 2008
Author(s)
Janet M. Roseland, Joanne M. Holden, K W. Andrews, Cuiwei Zhao, Amy Schweitzer, J Harnly, W R. Wolf, C R. Perry, J T. Dwyer, Mary F. Picciano, J. M. Betz, L G. Saldanha, Elizabeth A. Yetley, Kenneth D. Fisher, Katherine E. Sharpless
The Nutrient Data Laboratory, USDA, is collaborating with the Office of Dietary Supplements (ODS), the National Center for Health Statistics, and other government agencies to design and populate a Dietary Supplement Ingredient Database (DSID). This

Commutability of NIST SRM 1955 Homocysteine and Folate in Frozen Human Serum With Selected Total Homocysteine Immunometric or Enzymatic Assays

March 1, 2008
Author(s)
B C. Nelson, Christine M. Pfeiffer, Ming Zhang, David L. Duewer, Katherine E. Sharpless, Katrice Lippa
Background: The National Institute of Standards and Technology (NIST) and the Centers for Disease Control and Prevention (CDC) have recently developed Standard Reference Material (SRM) 1955 Homocysteine and Folate in Frozen Human Serum with certified