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1. Fast standard addition method for LA-ICPMS using a spinning platform
Published: 2/19/2013
Authors: John L Molloy, Stephen E Long, Fanny Claverie, Julian Malherbe, Naomi Bier
Abstract: A method has been developed for the fast and easy determination of Pb, Sr, Ba, Ni, Cu, and Zn, which are of geological and environmental interest, in solid samples by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS) using a samp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912435

2. Certification of NIST SRM 2569 Lead Paint Films for Children's Products
Published: 10/15/2012
Authors: John L Molloy, John R Sieber, Karen E Murphy, Stephen E Long, Stefan D Leigh
Abstract: SRM 2569 Lead Paint Films for Children’s Products is a new Standard Reference Material (SRM) developed for use primarily with XRF instrumentation. It consists of three paint coatings, with nominally 0 mg/kg, 90 mg/kg, and 300 mg/kg of Pb added, on p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909911

3. Disentangling the effects of polymer coatings on silver nanoparticle agglomeration, dissolution, and toxicity to determine mechanisms of nanotoxicity
Published: 9/1/2012
Authors: Justin M Zook, Melissa Danielle Halter, Danielle Cleveland, Stephen E Long
Abstract: Silver nanoparticles (AgNPs) are frequently coated by a variety of polymers, which may affect various intertwined mechanisms of toxicity, including agglomeration and dissolution rate. Here, we measure how citrate, dextran, poly(ethylene glycol) (PEG ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908497

4. Mercury Stable Isotopes in Seabird Eggs Reflect a Gradient from Terrestrial Geogenic to Oceanic Mercury Reservoirs
Published: 4/21/2012
Authors: Russell D Day, D G Roseneau, Sylvain Berail, Keith A. Hobson, O.F.X Donard, Stacy S Vander-Pol, Rebecca S Pugh, Amanda J Moors, Stephen E Long, Paul R Becker
Abstract: Elevated mercury concentrations ([Hg]) were found in Alaskan seabird eggs (Uria spp.) from the coastal embayment of Norton Sound relative to insular colonies in the northern Bering Sea. Stable isotopes of Hg, carbon (C), and nitrogen (N) were measure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909673

5. Pilot Estuarine Mesocosm Study on the Environmental Fate of Silver Nanomaterials Leached from Consumer Products
Published: 1/10/2012
Authors: Danielle Cleveland, Stephen E Long, Paul L. Pennington, Emily Cooper, Michael H. Fulton, Geoffrey I. Scott, Elijah J Petersen, Timothy M Brewer, Jeffrey M Davis, Laura J Wood
Abstract: Although nanosilver consumer products (CPs) now enjoy widespread availability, little work has been done to determine the environmental fate and leaching of silver nanoparticles (AgNPs) from these products. This type of work is crucial, since the lif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906343

6. Development and Certification of Green Tea-Containing Standard Reference Materials
Published: 11/30/2011
Authors: Lane C Sander, Mary Bedner, Michael C. Tims, James H Yen, David Lee Duewer, Barbara J. Porter, Steven J Christopher, Russell D Day, Stephen E Long, John L Molloy, Karen E Murphy, Brian E Lang, Rachel A. Lieberman, Laura J Wood, M. Payne, M. C. Roman, J. M. Betz, A. NguyenPho, Katherine E Sharpless, Stephen A Wise
Abstract: A suite of three green tea-containing Standard Reference Materials (SRMs) has been issued by the National Institute of Standards and Technology (NIST). The materials are characterized for catechins, xanthine alkaloids, theanine, and toxic elements. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906814

7. 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

8. 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

9. 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

10. 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