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Topic Area: Chemical Analysis

Displaying records 1 to 10 of 154 records.
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1. Mass Spectrometry Detection and Imaging of Organic and Inorganic Explosive Device Signatures using Desorption Electro-Flow Focusing Ionization
Topic: Chemical Analysis
Published: 6/26/2014
Authors: Thomas P Forbes, Edward Ryan Sisco
Abstract: We demonstrate the coupling of desorption electro-flow focusing ionization (DEFFI) with in-source collision induced dissociation (CID) for the mass spectrometric (MS) detection and imaging of explosive device components, including both organic, e.g., ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915906

2. Computer-Assisted Quality Control for Building Libraries from Electrospray Ionization Tandem Mass Spectra
Topic: Chemical Analysis
Published: 6/4/2014
Authors: Xiaoyu Yang, Pedatsur Neta, Stephen E Stein
Abstract: Electrospray ionization (ESI) tandem mass spectrometry coupled with liquid chromatography is a routine technique for identifying and quantifying compounds in complex mixtures. The identification step can be aided by matching acquired tandem mass ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915314

3. Chemical Imaging of Artificial Fingerprints by Desorption Electro-Flow Focusing Ionization Mass Spectrometry
Topic: Chemical Analysis
Published: 5/19/2014
Authors: Thomas P Forbes, Edward Ryan Sisco
Abstract: Desorption electro-flow focusing ionization (DEFFI) mass spectrometry was used to image chemical distributions of endogenous, e.g., fatty acids, and trace exogenous compounds, e.g., explosives, narcotics and lotions, in deposited and lifted artificia ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915130

4. Estimation of the Limit of Detection Using Information Theory Measures
Topic: Chemical Analysis
Published: 1/31/2014
Authors: Alexander (Alexander) Vergara Tinoco, Fonollosa Jordi, Huerta Ramon, Santiago Marco
Abstract: Definitions of the Limit of Detection (LoD) based on the probability of false positive and/or false negative errors have been proposed over the past years. Although such definitions are straightforward and valid for any kind of analytical system, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914425

5. Stabilized Phospholipid Membranes in Chromatography: Towards Membrane Protein-Functionalized Stationary Phases
Topic: Chemical Analysis
Published: 1/25/2014
Authors: Elyssia S. Gallagher, Elisabeth Mansfield, Craig A. Aspinwall
Abstract: Transmembrane protein (TMP)-functionalized analytical platforms represent a powerful new paradigm in chemical analysis. Of particular interest is the development of high throughput, TMP-functionalized stationary phases for affinity chromatography of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914986

6. Connection between thermodynamics and dynamics of simple fluids in highly attractive pores
Topic: Chemical Analysis
Published: 10/25/2013
Authors: William P Krekelberg, Vincent K Shen, Daniel W Siderius, Thomas M. Truskett, Jeffrey R. Errington
Abstract: We investigate the structural and diffusive dynamics properties of a model fluid in highly-absorptive cylindrical pores. At subcritical temperatures, self diffusion displays three distinct regimes as a function of average pore density ρ: 1) a de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914566

7. Determination of Arsenic in Food and Dietary Supplement Standard Reference Materials by Neutron Activation Analysis
Topic: Chemical Analysis
Published: 9/1/2013
Author: Rick L Paul
Abstract: Arsenic has been measured in food and food supplement Standard Reference Materials by neutron activation analysis for the purpose of value-assigning As mass fractions and assessing homogeneity. Instrumental neutron activation analysis (INAA) has been ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910386

8. An Assessment of 25-Hydroxyvitamin D Measurements in Comparability Studies Conducted by the Vitamin D Metabolites Quality Assurance Program
Topic: Chemical Analysis
Published: 8/12/2013
Authors: Mary Bedner, Katrice A Lippa, Susan Shu Cheng Tai
Abstract: Background: The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Health Office of Dietary Supplements, established the first accuracy-based program for improving the comparability of vitamin D me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913070

9. Surface mediated assembly of small, metastable gold nanoclusters
Topic: Chemical Analysis
Published: 5/27/2013
Authors: John M Pettibone, William A Osborn, Konrad Rykaczewski, Albert A. Talin, John E Bonevich, Jeffrey W Hudgens
Abstract: The unique properties of metallic nanoclusters are attractive for numerous commercial and industrial applications but are generally less stable than nanocrystals. Thus, developing methodologies for stabilizing nanoclusters and retaining their enhance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909387

10. Standard Reference Materials for Dietary Supplement Analysis
Topic: Chemical Analysis
Published: 5/24/2013
Authors: Catherine A Rimmer, Joseph M Betz, Paul M Coates, Katherine E Sharpless, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912493



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