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Author: steven christopher

Displaying records 11 to 20 of 32 records.
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11. Simultaneous Determination of Inorganic Mercury, Methylmercury and Total Mercury Concentrations in Cryogenic Fresh-Frozen and Freeze-Dried Biological Reference Materials
Published: 10/1/2007
Authors: William C Davis, David Point, J Ignacio Garcia Alonso, Steven J Christopher, Stephen A Wise, Olivier F. X. Donard
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904255

12. Simultaneous Determination of Inorganic Mercury, Methylmercury, and Total Mercury Concentrations in Cryogenic Fresh-Frozen and Freeze-dried Biological Reference Materials
Published: 10/1/2007
Authors: David Point, William C Davis, J. I. Garcia Alonso, Mathilde Monperrus, Steven J Christopher, O.F. X. Donard, Paul R Becker, Stephen A Wise
Abstract: A double spike speciated isotope dilution (DS-SID) reaction model was developed to study and correct for the inadvertent transformations affecting methylmercury (MeHg), inorganic mercury (iHg) and total mercury (HgT) measurements in biological tissue ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832156

13. Standard Reference Materials for Foods and Dietary Supplements
Published: 9/1/2007
Authors: Katherine E Sharpless, Jeanice M Brown Thomas, Steven J Christopher, Robert R. Greenberg, Lane C Sander, Michele M Schantz, Michael James Welch, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902875

14. 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

15. Development and Application of an Ultratrace Method for the Speciation of Organotin Compounds in Natural Cryogenic Homogenized Biological Materials
Published: 4/1/2007
Authors: David Point, William C Davis, Steven J Christopher, Michael B. Ellisor, Rebecca S Pugh, Olivier F. X. Donard, Paul R Becker, Barbara J. Porter, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902826

16. Development and Application of an Ultratrace Method for the Speciation of Organotin Compounds in Natural Cryogenic Homogenized Biological Materials
Published: 11/1/2006
Authors: Steven J Christopher, David Point, Michael B. Ellisor, Rebecca S Pugh, Olivier F. X. Donard, Paul R Becker, Barbara J. Porter, Stephen A Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904405

17. Metal Complexes and Free Radical Toxicity Derived from Pfiesteria piscicida
Published: 11/1/2006
Authors: William C Davis, Peter D. Moeller, Kevin Beauchesne, Kevin Huncik, Steven J Christopher, Andrew Gelasco, Pamela Riggs-Gelasco
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904392

18. Murre Eggs (Uria aalge and U. lomvia) as Indicators of Mercury Contamination in the Alaskan Marine Environment
Published: 1/1/2006
Authors: Russell D Day, Stacy S Vander-Pol, Steven J Christopher, William C Davis, Rebecca S Pugh, K. S. Simac, D. G. Roseneau, Paul R Becker
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904346

19. Simultaneous Mass Bias and Elemental Fractionation Corrections Utilizing Isotopic Solid Standards and Laser Ablation ICPMS
Published: 12/1/2005
Authors: W Clay Davis, Steven J Christopher, Gregory C Turk
Abstract: Homogeneous incorporation of analytes of known isotopic abundance into sol-gel derived standards that mimic important mineral systems has the potential to contribute significantly to providing solid standard benchmarks for a range of applications. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832076

20. Improved Calibration Strategy for Measurement of Trace Elements in Biological and Clinical Whole Blood Reference Materials via Collision-Cell Inductively Coupled Plasma Mass Spectrometry
Published: 11/1/2005
Authors: Gregory C Turk, Steven J Christopher, Russell D Day, Colleen E Bryan
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904464