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Application of microwave-induced combustion and isotope dilution strategies for quantification of sulfur in coals via sector-field inductively coupled plasma mass spectrometry

May 3, 2016

Author(s)

Steven J. Christopher, Thomas W. Vetter

In recent years microwave-induced combustion (MIC) has proven a robust sample preparation technique for difficult-to-digest samples containing high carbon content, especially for halogens and sulfur. NIST has applied the MIC methodology in combination with

High Levels of Gadolinium Deposition in the Skin of a Patient with Normal Renal Function

May 2, 2016

Author(s)

William C. Davis, Donna R. Roberts, Scott M. Lindhorst, Cynthia T. Welsh, Mary N. Herring, Adam Braun, Bruce H. Thiers

Objective: The aim of this study was to assess gadolinium deposition in the skin of a patient with normal renal function, based on estimated glomerular filtration rate (eGFR) values greater than 59 ml/min/1.73 m2, following exposure to large cumulative

Mass Spectrometry of Analytical Derivatives. 2. Ortho and Para Effects in Electron Ionization Mass Spectra of Derivatives of Hydroxyl, Mercapto and Amino Benzoic Acids

May 1, 2016

Author(s)

Nino G. Todua, Anzor I. Mikaia

Derivatives requiring either anhydrous or aqueous reaction conditions were prepared for robust and reliable gas chromatography mass spectrometry (GC-MS) characterization of hydroxyl, mercapto, and amino benzoic acids. Methylation and trialkylsilylation

Gulf of Mexico Research Initiative 2014/2015 Hydrocarbon Intercalibration Experiment: Description and Results for SRM 2779 Gulf of Mexico Crude Oil and Candidate SRM 2777 Weathered Gulf of Mexico Crude Oil

April 20, 2016

Author(s)

Jacolin A. Murray, Lane C. Sander, Stephen A. Wise, Christopher M. Reddy

Following an open meeting entitled, Hydrocarbon Chemistry QA/QC, at the 2014 Gulf of Mexico Oil Spill and Ecosystem Science Conference in Mobile, Alabama, the Gulf of Mexico Research Initiative (GoMRI) initiated the Hydrocarbon Intercalibration

How to measure absolute P3HT crystallinity via 13C CPMAS NMR

April 20, 2016

Author(s)

Ryan C Nieuwendaal

We outline the details of acquiring quantitative 13C cross-polarization magic angle spinning (CPMAS) NMR spectra on the most ubiquitous polymer for organic electronics (OE) applications, poly(3-hexylthiophene) (P3HT), despite other groups claims that

Exciton Dynamics in Monolayer Transition Metal Michalcogenides

April 19, 2016

Author(s)

Galan A. Moody, John Schaibley, Xiaodong Xu

Since the discovery of semiconducting monolayer transition metal dichalcogenides, a variety of experimental and theoretical studies have been carried out seeking to understand the intrinsic exciton population decay and valley relaxation dynamics. Reports

Quantitative interpretation of molecular dynamics simulations for X-ray photoelectron spectroscopy of aqueous solutions

April 19, 2016

Author(s)

Cedric J. Powell, Giorgia Olivieri, Krista Parry, Douglas Tobias, Matthew Brown

Over the past decade, energy-dependent X-ray photoelectron spectroscopy (XPS) has emerged as a powerful analytical probe of the ion spatial distributions at the vapor (vacuum)-aqueous electrolyte interface. These experiments are often paired with

Development of Two Fine Particulate Matter Standard Reference Materials ( 4 mm and 10 mm) for the Determination of Organic and Inorganic Constituents

April 13, 2016

Author(s)

Michele M. Schantz, Danielle Cleveland, N. Alan Heckert, John Kucklick, Stefan D. Leigh, Stephen E. Long, Jennifer Lynch, Karen E. Murphy, Rabia Oflaz, Adam L. Pintar, Barbara J. Porter, Savelas A. Rabb, Stacy Schuur, Stephen Wise, Rolf L. Zeisler

Two new Standard Reference Materials (SRMs), SRM 2786 Fine Particulate Matter ( 4 µm) and SRM 2787 Fine Particulate Matter ( 10 µm) have been developed in support of the US Environmental Protection Agency's National Ambient Air Quality Standards for

Fourier Transform Infrared Absorption Spectroscopy for Quantitative Analysis of Gas Mixtures for Homeland Security Applications at Low Temperatures

April 13, 2016

Author(s)

Douglas C. Meier, Kurt D. Benkstein, Wilbur S. Hurst, Pamela M. Chu

Performance specifications for point chemical vapor detectors are specified in ASTM E2885-13 and ASTM E2933-13. The performance evaluation of the detectors requires the accurate delivery of known concentrations of the chemical target to the system under

Size-exclusion chromatography of metal nanoparticles and quantum dots

April 8, 2016

Author(s)

Leena M. Pitkanen, Andre Striegel

This review presents an overview of size-exclusion chromatographic separation and characterization of noble metal nanoparticles (NPs) and quantum dots (QDs) over the past 25 years. The properties of NPs and QDs that originate from quantum and surface

Reclamation-NIST Exploratory Research Symposium Summary Report

April 6, 2016

Author(s)

Nicholas Barbosa, Jessica Torrey

The Reclamation-NIST Exploratory Research Symposium was held on August 4-5, 2015, at the Reclamation Denver Federal Center facility in Lakewood, CO, and the NIST facility in Boulder, CO. Staff from the Bureau of Reclamation and the National Institute of

A trade-off between the mechanical strength and microwave electrical properties of functionalized and irradiated carbon nanotube sheets

April 4, 2016

Author(s)

Tiffany S. Williams, Nate Orloff, James S. Baker, Sandi G. Miller, Bharath N. Natarajan, Jan Obrzut, Linda S. McCorkle, Marisabel Lebron-Colon, James Gaier, Michael A. Meador, James Alexander Liddle

Carbon nanotube sheets are novel implementation of carbon nanotubes that enable the tailoring of electrical and mechanical properties for applications in the automotive and aerospace industries. Small molecule functionalization and/or post-processing

Development of a Comprehensive Steroid Hormone Screening Method using Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)

April 2, 2016

Author(s)

Ashley S. Boggs-Russell, John Bowden, Louis J. Guillette, John R. Kucklick

The ability to monitor endocrine pathways is often limited by techniques that use indirect measurement or single-hormone/class analysis. As our knowledge of the interconnections of the endocrine system grows, there is a need to develop highly specific

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