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Search Publications by Katrice Lippa

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Displaying 1 - 25 of 62

Production and Analysis of RM 8403 Cocoa Flavanol Extract

October 23, 2020
Catherine A. Rimmer, Katrice A. Lippa, James H. Yen, Ugo Bussy, Gregory Hewitt, Nicholas P. Anderson, Catherine Kwik-Uribe
NIST Reference Material 8403 is intended for use in harmonizing methods for the determination of cocoa flavanols monomers and their oligomers up to a degree of polymerization (DP) of 7 units. RM 8403 is a free-flowing powder containing cocoa flavanols

A NIST-Hosted Virtual Workshop on Measuring SARS-CoV-2 in Wastewater and Fecal Material: A Call for Standards

September 28, 2020
Sandra M. Da Silva, Paulina K. Piotrowski, Christina M. Jones, Stephanie L. Servetas, Nancy J. Lin, Katrice A. Lippa, Scott A. Jackson
The National Institute of Standards and Technology (NIST) has leveraged its expertise in chemical and biological metrology and standards development as well as its strong relationships with stakeholders to host a virtual workshop on June 16, 2020 that

NIST/NIH Vitamin D Metabolites Quality Assurance Program (VitDQAP): Final Report

September 16, 2020
Katrice A. Lippa, Mary Bedner, Susan Tai, Carolyn Q. Burdette
The National Institute of Standards and Technology (NIST) established a Vitamin D Metabolites Quality Assurance Program (VitDQAP) in collaboration with the National Institutes of Health Office of Dietary Supplements (NIH-ODS) in 2009. The VitDQAP at NIST

Metrological Tools for the Reference Materials and Reference Instruments of the NIST Material Measurement Laboratory

July 15, 2020
Carlos R. Beauchamp, Johanna Camara, Jennifer Carney, Steven J. Choquette, Kenneth D. Cole, Paul C. DeRose, David L. Duewer, Michael S. Epstein, Margaret C. Kline, Katrice A. Lippa, Enrico Lucon, Karen W. Phinney, Maria Polakoski, Antonio M. Possolo, Katherine E. Sharpless, John R. Sieber, Blaza Toman, Michael R. Winchester, Donald A. Windover
The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, was established by the U.S. Congress in 1901 and charged with establishing a measurement foundation to facilitate U.S. and international commerce. NIST

Harnessing Measurement Science to Advance Food Safety

April 15, 2020
Melissa M. Phillips, David M. Bunk, Carlos A. Gonzalez, Scott A. Jackson, Leah R. Kauffman, Katrice A. Lippa, Catherine A. Rimmer, Stephen Semancik, Michael R. Winchester, Laura J. Wood

Metabolomics Test Materials for Quality Control: A Study of a Urine Materials Suite

November 7, 2019
Dan Bearden, David A. Sheen, Yamil Simon, Bruce A. Benner Jr., Werickson Fortunato de Carvalho Rocha, Niksa Blonder, Katrice A. Lippa, Richard Beger, Laura Schnackenberg, Jinchun Sun, Khyati Mehta, Amrita Cheema, Haiwei Gu, Ramesh Marupaka, Nagana Gowda, Daniel Raftery
There is a lack of experimental reference materials and standards for metabolomics measurements, such as urine, plasma, and other human fluid samples. Reasons include difficulties with supply, distribution, and dissemination of information about the

Enhancing the Accuracy of Measurement of Small Molecule Organic Biomarkers

October 30, 2019
Tang Lin Teo, Katrice A. Lippa, Lindsey Mackay, Sharon Yong, Qinde Liu, Johanna Camara, Vincent Delatour, Tong Kooi Lee, Beatrice Lalere, Gavin O'Connor, Andr? Henrion, Megumi Kato, Jane L. Fernandes, Masahiko Numata, Ha-Jeong Kwon, Ji-Seon Jeong, Bei Xu, Jintana Nammoommoy, Dewei Song, Wagner Wollinger
Over two decades, the Organic Analysis Working Group (OAWG) of the Consultative Committee for Amount of Substance (CCQM) has organised a number of comparisons for clinically relevant small molecule organic biomarkers. These comparisons are hinged upon the

Towards quality assurance and quality control in untargeted metabolomics studies

January 3, 2019
Richard Beger, Warwick Dunn, Abbas Bandukwala, Bianca Bethan, David Broadhurst, Clary Clish, Surendra Dasari, Leslie Derr, Annie Evans, Steve Fischer, Thomas Flynn, Thomas Hartung, David Herrington, Richard Higashi, Ping-Ching Hsu, Christina M. Jones, Maureen Kachman, Helen Karuso, Gary Kruppa, Katrice A. Lippa, Padma Maruvada, Jonathan Mosley, Ionna Ntai, Clair O?Donovan, Mary Playdon, Daniel Raftery, Daniel Shaughnessy, Amanda Souza, Timothy Spaeder, Barbara Spalholz, Mukesh Verma, Tilman Walk, Ian Wilson, Daniel Bearden, Krista Zanetti
We describe here the agreed upon first development steps and priority objectives of a community engagement effort to address current challenges in quality assurance (QA) and quality control (QC) in untargeted metabolomic studies. This has included (1) a QA

A new realization of SI for organic chemical measurement: NIST PS1 Primary Standard for quantitative NMR (Benzoic Acid)

July 30, 2018
Michael A. Nelson, Jason F. Waters, Blaza Toman, Brian E. Lang, Alexander R?ck, Kathrin Breitruck, Markus Obkircher, Anthony Windust, Katrice A. Lippa
Metrological traceability to common references supports the comparability of chemical measurement results produced by different analysts, at various times, and at separate places. Ideally, these references are realizations of base units of the

A Review of Approaches for the SI Traceable Value Assignment of the Purity of Peptides Using the Model Compound Angiotensin I

November 28, 2017
Ralf D. Josephs, Norbert Stoppacher, Adeline Daireaux, Tiphaine Choteau, Katrice A. Lippa, Karen W. Phinney, Steven Westwood, Robert Wielgosz
Accurate diagnosis, monitoring and treatment are cornerstones of a healthcare system and require reliable and consistent measurements. The traceability of measurement results to stated references, and the development of Reference Measurement Systems (RMS)

Classification of petroleum Standard Reference Materials and other fuels by chemometric analysis of gas chromatography-mass spectrometry data

February 23, 2017
Werickson Fortunato de Carvalho Rocha, Michele M. Schantz, David A. Sheen, Katrice A. Lippa, Pamela M. Chu
As feedstocks transition from conventional oil to increasing amounts of unconventional petroleum sources and biomass, it will be necessary to determine whether a particular fuel or fuel blend is suitable for use in engines. Certifying a fuel as safe for

Summary of NIST/SIM Chemical Metrology Working Group Training Opportunity: Isotope Dilution-Mass Spectrometry Clinical Measurement Course

December 22, 2016
Jeanita Pritchett, Katrice A. Lippa, Mary Bedner, Carolyn Q. Burdette, Johanna Camara, Brian E. Lang, Michael A. Nelson, Lane C. Sander, Lorna T. Sniegoski
The one week NIST-SIM chemical metrology training opportunity was designed to provide SIM NMI/DI laboratory personnel with in-depth classroom and hands-on laboratory experience for the implementation of isotope dilution/mass spectrometry (ID/MS) methods in

Evaluation of chemical purity using quantitative 1H-nuclear magnetic resonance

September 28, 2016
Blaza Toman, Michael A. Nelson, Katrice A. Lippa
Chemical purity assessment using quantitative 1H-nuclear magnetic resonance spectroscopy is a method based on ratio references of mass and signal intensity of the analyte species to that of chemical standards of known purity. As such, it is an example of a

Probing the intracellular glutathione redox potential using in-cell NMR spectroscopy

January 2, 2014
Steve Y. Rhieu, Aaron A. Urbas, Daniel W. Bearden, John P. Marino, Vytautas Reipa, Katrice A. Lippa
Non-invasive and real-time analysis of cellular redox processes has been greatly hampered by lack of suitable measurement techniques. Here we describe an in-cell nuclear magnetic resonance (NMR)-based method for measuring the intracellular glutathione

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

May 24, 2013
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