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Chemistry

Analytical chemistry

Search Publications

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  • Published Date
Displaying 51 - 75 of 2084

Bilirubin measurements in neonates: uniform neonatal treatment can only be achieved by improved standardization

July 26, 2024
Author(s)
Christian Hulzebos, Johanna Camara, Miranda van Berkel, VINCENT DELATOUR, Stanley Lo, Agnes Mailloux, Marcel Schmidt, Mercy Thomas, Lindsey Mackay, Ronda Greaves
Measurement of total serum bilirubin (TSB) concentration is the gold standard approach for diagnosing neonatal unconjugated hyperbilirubinemia. It is of utmost importance that the measured TSB concentration is sufficiently accurate to prevent

Metabolomics 2023 Workshop Report: Moving Toward Consensus on Best QA/QC Practices in LC-MS-Based Untargeted Metabolomics

July 9, 2024
Author(s)
Tracey Schock, Jonathan Mosley, Warwick Dunn, Julia Kuligowski, Matthew Lewis, Maria Monge, Candice Ulmer Holland, Dajana Vuckovic, Krista Zanetti
Introduction: During the Metabolomics 2023 conference, the Metabolomics Quality Assurance and Quality Control Consortium (mQACC) presented a workshop focusing on key quality assurance and quality control (QA/QC) topic categories for LC-MS-based untargeted

Cannabis Laboratory Quality Assurance Program: Exercise 2 Cannabinoid Final Report

June 25, 2024
Author(s)
Andrea Yarberry, Melissa M. Phillips, Walter Brent Wilson
NIST launched a Cannabis Laboratory Quality Assurance Program (CannaQAP) in 2020 to assist laboratories in demonstrating and improving cannabis (hemp and marijuana) measurement comparability and competence. CannaQAP provides tools that allow analysts and

Characterization of Reference Material 8210: Hemp Plant

June 20, 2024
Author(s)
Colleen E. Bryan Sallee, Walter Brent Wilson, Charles Barber, Monique Johnson, Jenna Klingsick, Jerome Mulloor, Blaza Toman, Elena Wood, Laura Wood, Andrea Yarberry
The National Institute of Standards and Technology (NIST) Reference Material (RM) 8210 Hemp Plant delivers non certified values for cannabinoids and toxic elements in a dried ground hemp plant material to help cannabis and forensic laboratories for use as

Mixture effects of PFAS on embryonic and larval sheepshead minnows (Cyprinodon variegatus)

May 22, 2024
Author(s)
Philip Tanabe, Peter Key, Katy Chung, Emily Pisarski, Jessica Reiner, Alix Rodowa, Jason Magnuson, Marie DeLorenzo
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous and persistent environmental contaminants originating from many everyday products. Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) are two PFAS that are commonly found at high

Observation of a promethium complex in solution

May 22, 2024
Author(s)
Bruce D. Ravel, Darren Driscoll, Frankie White, SUBHAMAY PRAMANIK, Jeffrey Einkauf, Dmytro Bykov, Santanu Roy, Richard Mayes, Laetitia Delmau, Samantha Schrell, Thomas Dyke, April Miller, Matt Silveira, Silveira2 van Cleve, Roy Copping, Sandra Davern, Santa Jansone-Popova, Ilja Popovs, Alexander Ivanov
Lanthanide rare earth metals are ubiquitous in modern technologies, but we know little about chemistry of the 61st element, promethium (Pm), a lanthanide which is highly radioactive and inaccessible. Despite its significance, Pm has conspicuously been

NIST's Engagement with CCQM Studies from 1992 to 2023: History and Performance

May 21, 2024
Author(s)
David L. Duewer, Christina Cecelski, Megan Cleveland, Nancy Lin, Katrice Lippa, Jacqueline L. Mann, John L. Molloy, Michael Nelson, James E. Norris, Kenneth W. Pratt, Sumona Sarkar, Hratch G. Semerjian, Robert L. Watters
This report documents the engagement and measurement performance of the National Institute of Standards and Technology (NIST) in studies coordinated by the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM) from 1992

Perspective: use and reuse of NMR-based metabolomics data: what works and what remains challenging

March 13, 2024
Author(s)
Tracey Schock, Goncalo Gouveia, Thomas Head, Leo L. Cheng, Chaevian Clendinen, John Cort, Xiuxia Du, Edison Arthur, Candace Fleischer, Jeffrey C. Hoch, Nathaniel Mercaldo, Wimal Pathmasiri, Daniel Raftery, Lloyd Sumner, Panteleimon Takis, Valerie Copie, Hamid R. Eghbalnia, Robert Powers
The National Cancer Institute (NCI) issued a Request for Information (RFI) in October 2022, soliciting input on using and reusing metabolomics data. This RFI aimed to seek input on best practices for metabolomics data storage, management, and use/reuse. In

Comparison of N-glycopeptide to released N-glycan abundances and the influence of glycopeptide mass and charge state on N-linked glycosylation of IgG antibodies

March 7, 2024
Author(s)
Concepcion Remoroza, Meghan Burke Harris, Tytus Mak, Sergey Sheetlin, Yuri Mirokhin, Zachary Goecker, Brian T. Cooper, Mark Lowenthal, Xiaoyu (Sara) Yang, Guanghui Wang, Dmitrii V. Tchekhovskoi, Stephen E. Stein
We report the comparison of mass-spectral-based abundances of tryptic glycopeptides to fluorescence abundances of released labeled glycans and the effects of mass and charge state and in-source fragmentation on glycopeptide abundances. The primary

Isotopic effects on in-plane hyperbolic phonon polaritons in MoO3

March 4, 2024
Author(s)
Jeremy Schultz, Sergiy Krylyuk, Jeffrey Schwartz, Albert Davydov, Andrea Centrone
Hyperbolic phonon polaritons (HPhPs), hybrids of light and lattice vibrations in polar dielectric crystals, empower nano-photonic applications by enabling the confinement and manipulation of light at the nanoscale. Molybdenum trioxide (α-MoO3) is a

Certification of Standard Reference Material(R) 1595a Tripalmitin

March 1, 2024
Author(s)
Michael Nelson, Jerome Mulloor, Brian Lang, Blaza Toman, Antonio Possolo, William Perry, Alicia Lyle
Standard Reference Material (SRM) 1595a Tripalmitin is a high purity chemical substance having a certified value for purity, expressed as a mass fraction. It is intended for use in preparing calibrants for measurement of total glyceride in clinical samples

Correlating Near-Infrared Spectra to Bulk Properties in Polyolefins

February 28, 2024
Author(s)
Bradley Sutliff, Shailja Goyal, Tyler Martin, Peter Beaucage, Debra Audus, Sara Orski
The industry standard for sorting plastic wastes is near-infrared (NIR) spectroscopy, which offers rapid and nondestructive identification of various plastics. However, NIR does not provide insights into the chain composition, conformation, and topology of

Establishing a framework for best practices for quality assurance and quality control in untargeted metabolomics

February 12, 2024
Author(s)
Tracey Schock, Jonathan Mosley, Chris Beecher, Warwick Dunn, Julia Kuligowski, Matthew Lewis, Georgios Theodoridis, Candice Ulmer, Dajana Vuckovic, Ian Wilson, Krista Zanetti
Background: Quality assurance (QA) and quality control (QC) practices are key tenets that facilitate study and data quality across all applications of untargeted metabolomics. Such important practices will strengthen this field and accelerate its success

Certification of Standard Reference Material(R) 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa)

January 29, 2024
Author(s)
Colleen E. Bryan Sallee, Melannie Bachman, Steven J. Christopher, Debra Ellisor, Michael Ellisor, Jennifer Hoguet, Samuel Huntington, Caleb Luvonga, Amanda Moors, Dhayaalini Nadarajan, Tomohiro Narukawa, Jennifer Ness, Rebecca Pugh, James H. Yen, Lee L. Yu
Standard Reference Material (SRM) 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa) is intended to be used for the evaluation of methods for the determination of elements, arsenic species, and proximates in this and similar matrices. A unit of SRM
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