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Displaying records 11 to 20 of 104 records.
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11. Determination of Trace Sulfur in Biodiesel and Diesel Standard Reference Materials by Isotope Dilution Sector Field Inductively Coupled Plasma Mass Spectrometry
Topic: Chemical Analysis
Published: 11/14/2013
Authors: Steven J Christopher, Stephen E Long, Renata Amais, Joaquim N¿ga
Abstract: A method is described for quantification of sulfur at low concentrations on the order of 10 µg g-1 in biodiesel and diesel fuels using double isotope dilution and sector field inductively coupled plasma mass spectrometry (ID-SF-ICP-MS). Closed vessel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912375

12. 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

13. 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

14. 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

15. The Development and Implementation of Quality Assurance Programs to Support Nutritional Measurements
Topic: Chemical Analysis
Published: 5/24/2013
Authors: Lane C Sander, Mary Bedner, David Lee Duewer, Katrice A Lippa, Melissa Meaney Phillips, Karen W Phinney, Catherine A Rimmer, Michele M Schantz, Katherine E Sharpless, Susan Shu Cheng Tai, Jeanice M Brown Thomas, Stephen A Wise, Laura J Wood, J. M. Betz, Paul M Coates
Abstract: 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 de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912409

16. DNA Purification From Crude Samples for Human Identification Using Gradient Elution Isotachophoresis
Topic: Chemical Analysis
Published: 5/23/2013
Authors: Elizabeth A Strychalski, Christopher Konek, Erica L Romsos, Peter M Vallone, Alyssa Henry, David J Ross
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913391

17. Chemical imaging beyond the diffraction limit using photothermal induced resonance microscopy
Topic: Chemical Analysis
Published: 4/2/2013
Authors: Andrea Centrone, Basudev Lahiri, Glenn E Holland
Abstract: Photo Thermal Induced Resonance (PTIR), recently attracted great interest for enabling chemical identification and imaging with nanoscale resolution. In this paper, the PTIR working principles are reviewed along the main results from a recent publica ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913386

18. Discriminating the states of matter in metallic nanoparticle transformations: What are we missing?
Topic: Chemical Analysis
Published: 2/20/2013
Authors: John M Pettibone, Julien C. Gigault, Vincent A Hackley
Abstract: A limiting factor in assessing the risk of current and emerging nanomaterials in biological and environmental systems is the ability to accurately detect and characterize their size, shape and composition in broad distributions and complex media. Asy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913009

19. Chemical Imaging Beyond the Diffraction Limit: Experimental Validation of the PTIR Technique
Topic: Chemical Analysis
Published: 2/11/2013
Authors: Basudev Lahiri, Glenn E Holland, Andrea Centrone
Abstract: Photo Thermal Induced Resonance (PTIR), recently attracted great interest for enabling chemical identification and imaging with nanoscale resolution. In this work, electron beam nano-patterned polymer samples were fabricated directly on 3-dimentional ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911012

20. Weathering Patterns of Ignitable Liquids with the Advanced Distillation Curve Method
Series: Journal of Research (NIST JRES)
Report Number: 118.003
Topic: Chemical Analysis
Published: 1/17/2013
Authors: Samuel Allen, Thomas J Bruno
Abstract: One can take advantage of the striking similarity of ignitable liquid vaporization (or weathering) patterns and the separation observed during distillation to predict the composition of residual compounds in fire debris. This is done with the ad ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907398



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