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Displaying 126 - 150 of 4036

Value Assignment of Standard Reference Material(R) 1849b Infant/Adult Nutritional Formula I

January 6, 2023
Author(s)
Melissa M. Phillips, Laura Wood, Charles Barber, Bruce Scruggs, John Sieber, James H. Yen, Lee L. Yu
The National Institute of Standards and Technology (NIST) Standard Reference Material® (SRM®) 1849b Infant/Adult Nutritional Formula I delivers certified or non-certified values for over 100 analytes. This material is intended to be used for the evaluation

Field-Deployable Devices

January 1, 2023
Author(s)
Thomas P. Forbes, Raychelle Burks
Reductions in instrument size, weight, and power continue to facilitate the development and application of field-deployable devices for investigative purposes. Portable analytical instrumentation supporting the rapid and reliable identification of two

Isotope Dilution Mass Spectrometry as an Independent Assessment for Mass Measurements of Milligram Quantities of Aqueous Solution

January 1, 2023
Author(s)
Richard Essex, Jacqueline L. Mann, Denis E. Bergeron, Ryan P. Fitzgerald, Svetlana Nour, Gordon A. Shaw, R. Michael Verkouteren
Isotope dilution mass spectrometry was used to independently assess the accuracy of mass measurement methods developed to quantitatively dispense milligram quantities of aqueous solution. Solutions of isotopically enriched 158Gd and enriched 155Gd were

Cannabis Quality Assurance Program: Exercise 2 Toxic Elements Final Report

December 15, 2022
Author(s)
Chuck Barber, Colleen E. Bryan Sallee, Carolyn Burdette, Shaun Kotoski, Melissa M. Phillips, Walter Brent Wilson, Laura Wood
In 2020, NIST launched CannaQAP to improve the comparability of the analytical measurements of cannabis and cannabis-derived products in forensic and cannabis (hemp and marijuana) testing laboratories. CannaQAP is an interlaboratory study mechanism that is

Development of an Improved Standard Reference Material for Folate Vitamers in Human Serum

December 12, 2022
Author(s)
Johanna Camara, Jeanita Pritchett, Yasmine Daniels, Mary Bedner, Michael Nelson, Mark Lowenthal, Zia Fazili, Christine Pfeiffer, Karen W. Phinney, Katherine E. Sharpless, Lane C. Sander, Katrice Lippa, James H. Yen, Adam Kuszak, Stephen Wise
The US National Institute of Standards and Technology (NIST) developed a Standard Reference Material® (SRM®) 3949 Folate Vitamers in Frozen Human Serum to replace SRM 1955 Homocysteine and Folate in Human Serum. The presence of increased endogenous levels

Summary Report: Strategic Workshop on Management of PFAS in the Environment

November 30, 2022
Author(s)
Andrea Leeson, David Adamson, Lisa Alvarez-Cohen, Hunter Anderson, Frank Barranco, Christopher Bellona, Jens Blotevogel, Mark Brusseau, Michelle Crimi, Brian Crone, Rula Deeb, Dominic Di Toro, Craig Divine, Jennifer Field, Rajat Ghosh, Philip Gschwend, Jennifer Guelfo, Paul Hatzinger, Damian Helbling, Heather Henry, Christopher Higgins, Peter Jaffe, Detlef Knappe, Paul Koster van Groos, Linda Lee, Jinxia Liu, Shaily Mahendra, Carrie McDonough, Selma Mededovic, Marc Mills, Charles Newell, Carla Ng, Dung (Zoom) Nguyen, Bonnie Packer, Cara Patton, Graham Peaslee, Kurt Pennell, Jovan Popovic, Philip Potter, Joseph Quinnan, Maya Rabinowitz, Jessica L. Reiner, Stephen Richardson, Charles Schaefer, David Sedlak, Erin Shields, Jason Speicher, Thomas Speth, Timothy Strathmann, Hans Stroo, Timothy Thompson, Paul Tratnyek, Janice Willey

Cannabis Laboratory Quality Assurance Program: Exercise 2 Moisture Final Report

November 29, 2022
Author(s)
Chuck Barber, Colleen E. Bryan Sallee, Carolyn Burdette, Shaun Kotoski, Melissa M. Phillips, Walter Brent Wilson, Laura Wood
In 2020, NIST launched Cannabis Laboratory Quality Assurance Program (CannaQAP) to improve the comparability of the analytical measurements of cannabis and cannabis-derived products in forensic and cannabis (hemp and marijuana) testing laboratories

Deep Learning Image Analysis of Nanoplasmonic Sensors: Toward Medical Breath Monitoring

November 23, 2022
Author(s)
Yangyang Zhao, Boqun Dong, Kurt D. Benkstein, Lei Chen, Kristen L. Steffens, Stephen Semancik
Sensing biomarkers in exhaled breath offers a potentially portable, cost-effective, and noninvasive strategy for disease diagnosis screening and monitoring, while high sensitivity, wide sensing range, and target specificity are critical challenges. We
Displaying 126 - 150 of 4036