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Author: stephen long

Displaying records 11 to 20 of 35 records.
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11. Measuring silver nanoparticle dissolution in complex biological and environmental matrices using UV-Visible absorbance
Published: 8/2/2011
Authors: Justin M Zook, Stephen E Long, Danielle Cleveland, Carly Lay Geronimo, Robert I. MacCuspie
Abstract: Distinguishing the toxic effects of nanoparticles (NPs) themselves from the well-studied toxic effects of their ions is a critical but challenging measurement for nanotoxicity studies and regulation. This measurement is especially difficult for silv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907804

12. Measurements of Methylmercury, Ethylmercury, and Inorganic Mercury Species in a Whole Blood Standard Reference Material: SRM 955c Toxic Elements in Caprine Blood
Published: 10/28/2010
Authors: William C Davis, Stephen E Long
Abstract: Trace elemental speciation analysis is assuming more critical importance in nutritional and toxicological assessments, and despite the necessity to quantitatively differentiate elemental species in environmental and clinical samples, there are a limi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905900

13. IMEP-28: Total Arsenic, Cadmium, Lead and Mercury in Food Supplements
Published: 10/30/2009
Authors: Lane C Sander, Stephen E Long, Steven J Christopher, Russell D Day, Karen E Murphy, Ines Baer, Beatriz de la Calle, Inge Verbist, Danny Vendelbo, Hakan Emteborg, Philip Taylor
Abstract: The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre (JRC), a Directorate-General of the European Commission, operates the International Measurement Evaluation Programme IMEP. It organises interlaboratory compari ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903993

14. Demonstrating the Comparability of Certified Reference Materials
Published: 7/24/2009
Authors: David Lee Duewer, Katrice A Lippa, Stephen E Long, Karen E Murphy, Katherine E Sharpless, Lorna Tregoning Sniegoski, Michael James Welch
Abstract: Certified Reference Materials (CRMs) enable the meaningful comparison of measurement results over time and place. When CRMs are used to calibrate or verify the performance of a measurement system, results produced by that system can be related throu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901468

15. Development and Certification of the New SRM 695 Trace Elements in Multi-Nutrient Fertilizer
Published: 10/1/2007
Authors: Elizabeth A Mackey, Mark P Cronise, Curtis N Fales, Robert R. Greenberg, Stefan D Leigh, Stephen E Long, Anthony F Marlow, Karen E Murphy, Rabia Oflaz, John R Sieber, Laura J Wood, M. S. Rearick, Lee Lijian Yu, Stephen A. Wilson, Paul H. Briggs, Zoe A. Brown, J. Budahn, P. F. Kane, W L Marshall
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904247

16. Improved Certified Values for Total Mercury and Speciated Mercury in NIST Standard Reference Materials Using Isotope Dilution ICP-MS
Published: 10/1/2007
Authors: Stephen E Long, William C Davis, Steven J Christopher, Jacqueline L Mann, William R. Kelly
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904246

17. On the Certification of Cadmium at Trace and Ultratrace Levels in Standard Reference Materials Using ID ICP-MS
Published: 10/1/2007
Authors: Karen E Murphy, Stephen E Long, Robert D Vocke Jr
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904249

18. Characterization of a Suite of Ginkgo-Containing Standard Reference Materials
Published: 9/1/2007
Authors: Catherine A Rimmer, S. Howerton, Katherine E Sharpless, Lane C Sander, Stephen E Long, Karen E Murphy, Barbara J. Porter, K. Putzbach, M. S. Rearick, Stephen A Wise, Laura J Wood, Rolf Louis Zeisler, Diane K. Hancock, James H Yen, J. M. Betz, A. NguyenPho, L. Yang, C. Scriver, S. N Willie, R. Sturgeon, B. Schaneberg, C. Nelson, J. Skamarack, M. Pan, L. Kerri, D. Gray, E. H. Waysek, A. Blatter, E. Reich
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902872

19. Improved Certified Values for Total Mercury and Speciated Mercury in NIST SRMs Using Isotope Dilution ICP-MS
Published: 6/1/2007
Authors: Stephen E Long, William C Davis, Russell D Day, Steven J Christopher, Jacqueline L Mann, William R. Kelly
Abstract: Recent improvements in total mercury and mercury speciation measurement capabilities at the National Institute of Standards and Technology have resulted in enhanced sensitivity, selectivity and accuracy in a wide range of matrix reference materials. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832149

20. Development and Certification of the New SRM 695 Trace Elements in Multi-Nutrient Fertilizer
Published: 11/1/2006
Authors: Elizabeth A Mackey, Curtis N Fales, Robert R. Greenberg, Mark P Cronise, Stefan D Leigh, Stephen E Long, Anthony F Marlow, Karen E Murphy, Rabia Oflaz, John R Sieber, M. S. Rearick, L. J. Wood, L. L. Yu, S. A. Wilson, P. H. Briggs, Z. A. Brown, J. Budahn, P. F. Kane, W. L. Hall, Jr.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904387



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