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Search Publications by: Katherine E. Sharpless (Fed)

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Displaying 26 - 50 of 129

NIST Micronutrients Measurement Quality Assurance Program Winter and Summer 1999 Comparability Studies: Results for Round Robin XLV and XLVI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 12 Ascorbic Acid in Human Serum

August 7, 2013
Author(s)
David L. Duewer, Sam A. Margolis, Katherine E. Sharpless, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter and Summer 2000 Comparability Studies: Results for Round Robins XLVII and XLVIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 13 Ascorbic Acid in Human Serum

August 7, 2013
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1996 Comparability Studies: Results for Round Robin XXXVI, XXXVII, and XXXVIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 9 Ascorbic Acid in Human

August 7, 2013
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1997 Comparability Studies: Results for Round Robin XXXIX, XL, and XLI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 10 Ascorbic Acid in Human Serum

August 7, 2013
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1998 Comparability Studies: Results for Round Robin XLII, XLIII, and XLIV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 11 Ascorbic Acid in Human Seru

August 7, 2013
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2001 Comparability Studies: Results for Round Robin L Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 15 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2002 Comparability Studies: Results for Round Robin LII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 17 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Margaret C. Kline, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2003 Comparability Studies: Results for Round Robin LIV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 19 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2002 Comparability Studies: Results for Round Robin LI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 16 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2003 Comparability Studies: Results for Round Robin LIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 18 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

The Development and Implementation of Quality Assurance Programs to Support Nutritional Measurements

May 24, 2013
Author(s)
Lane C. Sander, Mary Bedner, David L. Duewer, Katrice A. Lippa, Melissa M. Phillips, Karen W. Phinney, Catherine A. Rimmer, Michele M. Schantz, Katherine E. Sharpless, Susan Tai, Jeanice M. Brown Thomas, Stephen A. Wise, Laura J. Wood, J. M. Betz, Paul M. Coates
The National Institute of Standards and Technology administers quality assurance programs devoted to improving measurements of nutrients and related metabolites in foods, dietary supplements, and serum and plasma samples. These programs have been developed

Development of Botanical and Marine Oil Standard Reference Materials for Fatty Acids

May 15, 2013
Author(s)
Michele M. Schantz, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise, James H. Yen, A. NguyenPho, Joseph M. Betz
As part of a collaboration with the National Institutes of Health’s Office of Dietary Supplements and the Food and Drug Administration’s Center for Drug Evaluation and Research, the National Institute of Standards and Technology has developed Standard

MILK AND SERUM SRMs for MONITORING ORGANIC CONTAMINANTS IN HUMAN SAMPLES

April 24, 2013
Author(s)
Michele M. Schantz, Katherine E. Sharpless, Stephen A. Wise, Rebecca Heltsley, Jennifer Keller, John Kucklick, Stacy VanderPol, Stefan D. Leigh, Donald G. Patterson, Jr., Andreas Sjodon, Wayman E. Turner
Four new Standard Reference Materials (SRMs) have been developed to assist in the quality assurance required for human biomonitoring studies. These materials are SRM 1953 Organic Contaminants in Non-Fortified Human Milk, SRM 1954 Organic Contamiants in

Standard Reference Materials for Food Analysis

March 21, 2013
Author(s)
Melissa M. Phillips, Katherine E. Sharpless, Stephen A. Wise
Well-characterized reference materials with assigned concentrations of nutrients are needed as matrix-matched controls for analytical measurements to assist food manufacturers in quality control and facilitate compliance with nutritional labeling laws. The

Preparation and Value Assignment of Standard Reference Material 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum

January 2, 2012
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Lane C. Sander, Katherine E. Sharpless, Lorna T. Sniegoski, Michael J. Welch, James H. Yen, Mugenya O. Isaac
Standard Reference Material 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum provides certified values for total retinol, γ- and α-tocopherol; total lutein, total zeaxanthin, total β-cryptoxanthin, total β-carotene, and cholesterol in

Development and Certification of a Standard Reference Material for Vitamin D Metabolites in Human Serum

December 5, 2011
Author(s)
Karen W. Phinney, Mary Bedner, Susan Tai, Veronica V. Vamathevan, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise
The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Health’s Office of Dietary Supplements (NIH-ODS) has developed a Standard Reference Material (SRM) for the determination of 25-hydroxyvitamin D [25

Development and Certification of Green Tea-Containing Standard Reference Materials

November 30, 2011
Author(s)
Lane C. Sander, Mary Bedner, Michael C. Tims, James H. Yen, David L. Duewer, Barbara J. Porter, Steven J. Christopher, Russell D. Day, Stephen E. Long, John L. Molloy, Karen E. Murphy, Brian E. Lang, Rachel A. Lieberman, Laura J. Wood, M. Payne, M. C. Roman, J. M. Betz, A. NguyenPho, Katherine E. Sharpless, Stephen A. Wise
A suite of three green tea-containing Standard Reference Materials (SRMs) has been issued by the National Institute of Standards and Technology (NIST). The materials are characterized for catechins, xanthine alkaloids, theanine, and toxic elements. As many

Isotope Dilution Liquid Chromatography - Mass Spectrometry Methods for Fat- and Water-Soluble Vitamins in Nutritional Formulations

November 24, 2011
Author(s)
Karen W. Phinney, Catherine A. Rimmer, Jeanice M. Brown Thomas, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise
Vitamins are essential to human health, and dietary supplements containing vitamins are widely used by individuals hoping to ensure they have adequate intake of these important nutrients. Measurement of vitamins in nutritional formulations is necessary to

Determination of Fat-Soluble Vitamins and Carotenoids in Standard Reference Material 3280 Multivitamin/Multielement Tablets by Liquid Chromatography with Absorbance Detection

August 17, 2011
Author(s)
Jeanice M. Brown Thomas, Katherine E. Sharpless, Catherine A. Rimmer, James H. Yen
The concentrations of selected fat-soluble vitamins and carotenoids in Standard Reference Material (SRM) 3280 Multivitamin/Multielement Tablets have been determined by two independent liquid chromatographic methods with measurements performed by the

Dietary Supplement Laboratory Quality Assurance Program: The First Five Exercises

August 17, 2011
Author(s)
Melissa M. Phillips, Catherine A. Rimmer, Laura J. Wood, Katrice A. Lippa, Katherine E. Sharpless, David L. Duewer, Lane C. Sander, J. M. Betz
The National Institute of Standards and Technology (NIST) has established a Dietary Supplement Quality Assurance Program (DSQAP) in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS). Program participants measure

Characterization of Three Berry Standard Reference Materials for Nutrients

June 30, 2011
Author(s)
Laura J. Wood, Katherine E. Sharpless, Monique Pichon, Barbara J. Porter, James H. Yen
The National Institute of Standards and Technology (NIST) has been working with the National Institutes of Health Office of Dietary Supplements to produce Standard Reference Materials (SRMs) of interest to analysts of dietary supplements. Some of these