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Exposure Research

Records 1 to 53 of 53
2012
PERGANTIS, S. A., T. L. JONES-LEPP, AND E. M. HEITHMAR. Hydrodynamic Chromatography On-line with Single Particle -Inductively Coupled Plasma – Mass Spectrometry for Ultratrace Detection of Metal-Containing Nanoparticles. Analytical Chemistry. American Chemical Society, Washington, DC, 84(15):6454-6462, (2012).
2011
HEITHMAR, E. M. Screening Methods for Metal-Containing Nanoparticles in Water. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-11/096, 2011.
2010
HEITHMAR, E. M. AND S. Pergantis. Characterizing Concentrations and Size Distributions of Metal-Containing Nanoparticles in Waste Water. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-10/117, 2010.
HEITHMAR, E. M. Detecting and Characterizing Engineered Nanomaterials: A Key Tool for Environmentally Responsible Nanotechnology. Presented at Invited Presentation at the University of Massechusetts, Amherst, MA, February 18, 2010.
MOMPLAISIR, G., C. G. ROSAL, E. M. HEITHMAR, K. E. VARNER, L. A. RIDDICK, D. F. BRADFORD, AND N. G. TALLENT-HALSELL. Development of a Solid Phase Extraction Method for Agricultural Pesticides in Large-Volume Water Samples. Journal of Separation Science. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 81:1380-1386, (2010).
HEITHMAR, E. M. AND E. M. Siska. Single Particle-Inductively Coupled Plasma Mass Spectrometry of Metal-Containing Nanomaterial in Surface Waters Around Las Vegas, Nevada, USA. Presented at 2010 Winter Conference on Plasma Spectrochemistry, Fort Myers, FL, January 03 - 09, 2010.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, K. E. VARNER, M. S. NASH, AND L. A. RIDDICK. Temporal Patterns and Sources of Atmospherically Deposited Pesticides in Alpine Lakes of the Sierra Nevada, California , USA. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 44(10):4609-4614, (2010).
2009
HEITHMAR, E. M. Characterizing Metal-Based Nanoparticles in Surface Water by Single-Particle ICPMS. Presented at American Chemical Society National Meeting, Salt Lake City, UT, March 22 - 26, 2009.
HEITHMAR, E. M. Characterizing Metal-based Nanoparticles in Surface Water by Single-particle ICPMS . Presented at 237th American Chemical Society National Meeting & Exposition, Salt Lake City, UT, March 22 - 26, 2009.
HEITHMAR, E. M. Recent Applications of Single Particle - Inductively coupled Plasma for Metal-Based Nanomaterial Determinations in Surface Water. Presented at SETAC North America Meeting, New Orleans, LA, November 23, 2009.
HEITHMAR, E. M. SINGLE-PARTICLE ICPMS FOR CHARACTERIZING METAL-BASED NANOPARTICLES IN THE ENVIRONMENT - ADVANCES AND CHALLENGES. Presented at International Conference on the Environmental Implications and Applications of Nanotechnology, Amherst, MA, June 09 - 11, 2009.
HEITHMAR, E. M. Single Particle ICPMS for Characterizing Metal-based Nanoparticles and Monitoring Transformation Processes in Surface Water. Presented at Symposium on Environmental Characterization of Engineered Nanoparticles at SETAC, Goteborg, SWEDEN, May 31 - June 04, 2009.
HEITHMAR, E. M. Single-Particle ICPMS for Characterizing Metal-Based Nanoparticles in the Environment-Advances and Challenges. Presented at International Conference on the Environmental Implications and Applications of Nanotechnology, Amherst, MA, June 11, 2009.
BRADFORD, D. F., N. G. TALLENT-HALSELL, E. M. HEITHMAR, G. MOMPLAISIR, C. G. ROSAL, M. S. NASH, K. E. VARNER, AND L. A. RIDDICK. Temporal and Spatial Patterns of Airborne Contaminants Relative to Amphibian Population in Sequoia and Kings Canyon National Parks, California. Presented at Sierra Nevada - Southern Cascades Contaminants Workshop, Three Rivers, CA, April 08 - 09, 2009.
2008
VARNER, K. E., B. A. SCHUMACHER, AND E. M. HEITHMAR. Sampling and Analysis of Nanomaterials in the Environment: A State-of-Science Review. Presented at 42nd Western Regional Meeting American Chemical Society, Las Vegas, NY, September 23 - 27, 2008.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, K. E. VARNER, L. A. RIDDICK, AND M. S. NASH. Temporal Patterns of Airborne Pesticides in Alpine Lakes of the Sierra Nevada, California. Presented at Society for Environmental Toxicology and Chemistry, Tampa, FL, November 16 - 20, 2008.
2007
BRADFORD, D. F., E. M. HEITHMAR, L. MCCONNELL, G. MOMPLAISIR, L. A. RIDDICK, C. G. ROSAL, S. SIMONICH, D. SPARLING, K. STANLEY, N. G. TALLENT-HALSELL, AND K. E. VARNER. AIRBORNE PESTICIDES AND POPULATION DECLINES OF A CALIFORNIA ALPINE FROG. Presented at Environmental Biology Seminar, Las Vegas, NV, February 14, 2007.
HEITHMAR, E. M., G. MOMPLAISIR, AND C. G. ROSAL. COMPLEMENTARY APPROACHES TO THE DETERMINATION OF ARSENIC SPECIES RELEVANT TO CONCENTRATED ANIMAL FEEDING OPERATIONS. Presented at National Environmental Monitoring Conference, Cambridge, MA, August 20, 2007.
BRADFORD, D. F., E. M. HEITHMAR, K. STANLEY, L. MCCONNELL, D. SPARLING, S. SIMONICH, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL AND SPATIAL PATTERNS OF AIRBORNE PESTICIDES IN THE ALPINE ENVIRONMENT OF A DECLINING CALIFORNIA AMPHIBIAN, THE MOUNTAIN YELLOW-LEGGED FROG. Presented at Understanding Agriculture's Effects on Amphibians and Reptiles in a Changing World, St. Louis, MO, February 06 - 08, 2007.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL PATTERNS OF AIRBORNE PESTICIDES IN THE HABITATE OF THE MOUNTAIN YELLOW-LEGGED FROG IN THE SOUTHERN SIERRA NEVADA. Presented at Annual Meeting of California-Nevada Amphibian Populations Task Force, Las Vegas, NV, January 18 - 20, 2007.
2006
ROSAL, C. G., G. MOMPLAISIR, AND E. M. HEITHMAR. DETERMINATION OF ORGANOPHOSPHORUS COMPOUNDS BY GC-ICPMS. Presented at 2006 Winter Conference on Plasma Spectrochemistry, Tucson, AZ, January 08 - 14, 2006.
BRADFORD, D. F., E. M. HEITHMAR, G. MOMPLAISIR, C. G. ROSAL, N. G. TALLENT-HALSELL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL VARIATION IN PESTICIDE LEVELS IN SURFACE WATERS OF THE SOUTHERN NEVADA, CALIFORNIA. Presented at Workshop: Knowledge, Uncertainties and Research Needs in Evaluationg the Role of Pesticides in Amphibian Population Declines in California and Globally, Society for Conservation Biology, San Jose, CA, June 24, 2006.
2005
Rosal, C G., G M. Momplaisir, AND E M. Heithmar. ROXARSONE AND TRANSFORMATION PRODUCTS IN CHICKEN MANURE: DETERMINATION BY CAPILLARY ELECTROPHORESIS-INDUCTIVELY COUPLES PLASMA MASS SPECTROMERTY. ELECTROPHORESIS. Wiley-VCH, Weinheim, Germany, 26(7-8):1606-1614, (2005).
2004
Heithmar, E M., G M. Momplaisir, AND C G. Rosal. ELEMENTAL SPECIATION FOR RISK MANAGEMENT DECISIONS. Presented at Hazardous Substance Research Centers (HSRC) Workshop, Las Vegas, NV, November 5, 2004.
MOMPLAISIR, G., C. G. ROSAL, AND ED HEITHMAR. JUDGING PUBLIC RISK - NOT ALL ARSENICS ARE CREATED EQUAL. Presented at US EPA ESD Open House, Las Vegas, NV, December 09, 2004.
2003
Rosal, C G., L A. Riddick, E M. Heithmar, G M. Momplaisir, K E. Varner, P. L. Ferguson, D F. Bradford, AND N G. TallentHalsell. ANALYSIS OF LOW-LEVEL PESTICIDES FROM HIGH-ELEVATION LAKE WATERS BY LARGE VOLUME INJECTION GCMS. Presented at Pittsburg Conference 2003, Orlando, FL, March 13, 2003.
Rosal, C G., L A. Riddick, E M. Heithmar, G M. Momplaisir, K E. Varner, P. L. Ferguson, D F. Bradford, AND N G. TallentHalsell. ANALYSIS OF LOW-LEVEL PESTICIDES FROM HIGH-ELEVATION LAKE WATERS BY LARGE-VOLUME INJECTION GCMS. Presented at Pittsburgh Confernece on Anlytical Chemistry and Applied Spectroscopy 2003, Orlando, FL, March 9-14, 2003.
Momplaisir, G M., K E. Varner, E M. Heithmar, C G. Rosal, L A. Riddick, P. L. Ferguson, B. Gentry, D F. Bradford, AND N G. TallentHalsell. DETERMINATION OF ULTRATRACE CONCENTRATIONS OF AGRICULTURAL PESTICIDES IN WATER USING SOLID-PHASE EXTRACTION AND ANALYSIS BY GC/MS. Presented at Pittsburgh Conference on Analytical Chemistry and Applied Spectrometry, Orlando, FL, March 9-14, 2003.
Rosal, C G., L A. Riddick, G M. Momplaisir, E M. Heithmar, AND K E. Varner. PULSED SPLITLESS AND LARGE-VOLUME INJECTION IN CAPILLARY GAS CHROMATOGRAPHY MASS SPECTROMETRY FOR THE DETERMINATION OF ULTRA-TRACE LEVEL PESTICIDE RESIDUES. Presented at National Environmental Monitoring Conference 2003, Arlington, VA, July 21-24, 2003.
Varner, K E., G M. Momplaisir, N G. TallentHalsell, D F. Bradford, P. L. Ferguson, L A. Riddick, C G. Rosal, AND E M. Heithmar. THE CHALLENGE OF ACQUIRING ALPINE LARGE VOLUME LAKE WATER SAMPLES FOR ULTRA TRACE LEVEL ANALYSIS. Presented at On-Site 11th International Conference, Phoenix, AZ, January 21-24, 2003.
2002
Rosal, C G., G M. Momplaisir, AND E M. Heithmar. DETERMINATION OF ROXARSONE, AN ARSENIC ANIMAL-FEED ADDITIVE, AND ITS TRANSFORMATION PRODUCTS IN CHICKEN MANURE BY CE-ICPMS AND HPLC-ICPMS. Presented at 2002 Winter Conference on Plasma Spectrochemistry, Scottsdale,, AZ, January 6-11, 2002.
Cizdziel, J V., T A. Hinners, AND E M. Heithmar. DETERMINATION OF TOTAL MERCURY IN FISH TISSUES USING PYROLYSIS ATOMIC ABSORPTION SPECTROMETRY WITH GOLD AMALGAMATION. WATER, AIR AND SOIL POLLUTION:FOCUS 135(1-4):355-370, (2002).
Heithmar, E M., C G. Rosal, AND J V. Cizdziel. DIRECT MERCURY ANALYSIS IN ENVIRONMENTAL SOLIDS BY ICPMS WITH ON-LINE SAMPLE ASHING AND MERCURY PRE-CONCENTRATION USING THE DIRECT MERCURY ANALYZER. Presented at 2002 Winter Conference on Plasma Spectrochemistry, Scottsdale, AZ, January 6-11, 2002.
Cizdziel, J V., T A. Hinners, J. E. Pollard, E M. Heithmar, AND C L. Cross. MERCURY CONCENTRATIONS IN SKELETAL MUSCLE OF FISH FROM LAKE MEAD, USA, RELATED TO FISH SIZE, CONDITION, TROPHIC LEVEL, LOCATION, AND CONSUMPTION RISK. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 43(3):309-317, (2002).
Heithmar, E M. THE ENVIRONMENTAL CHEMISTRY BRANCH - PROVIDING CHEMICAL ANSWERS TO ENVIRONMENTAL EXPOSURE AND RISK PROBLEMS. Presented at Water-Testing and Quality Assurance Symposium, Arlington, VA, August 11-14, 2002.
2001
Rosal, C G., G M. Momplaisir, AND E M. Heithmar. DETERMINATION OF A VETERINARY PROPHYLACTIC PHARMACEUTICAL AND ITS TRANSFORMATION PRODUCTS IN CHICKEN EXCRETA BY CAPILLARY ELECTROPHORESIS - UV AND CAPILLARY ELECTROPHORESIS - INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY. Presented at 24th International Symposium on Capillary Chromatography and Electrophoresis, Las Vegas, NV, May 20-24, 2001.
Rosal, C G., G M. Momplaisir, AND E M. Heithmar. DETERMINATION OF ROXARSONE, AN ARSENIC ANIMAL-FEED ADDITIVE. AND ITS TRANSFORMATION PRODUCTS IN CHICKEN MANURE BY CE-ICPMS AND UHPLC -ICPMS. Presented at 2002 Winter Conference on Plasma Spectrochemistry, Scottsdale, AZ, January 6-12, 2002.
Heithmar, E M., C G. Rosal, AND J V. Cizdziel. DIRECT MERCURY ANALYSIS IN ENVIRONMENTAL SOLIDS BY ICPMS WITH ON-LINE SAMPLE ASHING AND MERCURY PRECONCENTRATION USING A DIRECT MERCURY ANALYZER. Presented at Winter Conference on Plasma Spectrochemistry, Scottsdale, AZ, January 6-12, 2002.
Bradford, D F., E M. Heithmar, C L. Cross, B. Gentry, G M. Momplaisir, M S. Nash, N G. TallentHalsell, L A. Riddick, C G. Rosal, AND K E. Varner. DISTRIBUTIONS OF AIRBORNE AGRICULTURAL CONTAMINANTS RELATIVE TO AMPHIBIAN POPULATIONS IN THE SOUTHERN SIERRA NEVADA, CA. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-01/085 (NTIS PB2002-102156), 2001.
2000
Heithmar, E M. AND J V. Cizdziel. MEASUREMENT OF MERCURY IN SOLID ENVIRONMENTAL SAMPLES BY ICPMS WITH ON-LINE SAMPLE ASHING AND HG CONCENTRATION USING AN AUTOMATIC MERCURY ANALYZER (TM). Presented at Winter Conference on Plasma Spectrochemistry, Ft. Lauderdale, FL, January 10-15, 2000.
Momplaisir, G M., C G. Rosal, AND E M. Heithmar. NATIONAL PARKS SAMPLES: MULTI-ELEMENT BY INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY. Presented at 2000 Winter Conference on Plasma Spectrochemistry, Ft. Lauderdale, FL, January 10-15, 2000.
Heithmar, E M., C G. Rosal, G M. Momplaisir, AND J V. Cizdziel. PERFORMANCE OF THE HIGH-EFFICIENCY NEBULIZER (HEN) AT REDUCED FLOW RATES IN AN ICPMS SYSTEM. Presented at Winter Conference on Plasma Spectrochemistry, Ft. Lauderdale, FL, January 10-15, 2000.
1999
Cizdziel, J V., E M. Heithmar, AND T A. Hinners. MERCURY CONCENTRATIONS IN MUSCLE OF GAMEFISH FROM LAKE MEAD. Presented at Las Vegas Water Quality Forum, Las Vegas, NV, July 8, 1999.
1998
Momplaisir, G M., L D. Betowski, AND E M. Heithmar. DETERMINATION OF NINE ORGANOSELENIUM COMPOUNDS USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY COUPLED WITH ELECTROSPRAY MASS SPECTROMETRY. Presented at 46th American Society for Mass Spectrometry Conference on Mass Spectrometry and Allied Topics, Orlando, FL, May 31-June 4, 1998.
Gurka, D F., L D. Betowski, T A. Hinners, AND E M. Heithmar. ENVIRONMENTAL APPLICATIONS OF HYPHENATED QUADRUPOLE TECHNIQUES. Analytical Chemistry 60(7):454A-467A, (1998).
1997
1996
Heithmar, E M., S. A. Pergantis, AND T A. Hinners. EFFECT OF SPRAY-CHAMBER DESIGN ON UFL/ICP-MS WITH A HIGH-EFFICIENCY NEBULIZER. Presented at 1996 Winter Conference on Plasma Spectrochemistry, Ft. Lauderdale, FL, January 8-13, 1996.
Pergantis, S. A., E M. Heithmar, AND T A. Hinners. THE SPECIATION OF ARSENIC IN REFERENCE MATERIALS BY USING MICRO-HPLC/ICP-MS. Presented at 1996 Winter Conference on Plasma Spectrochemistry, Ft. Lauderdale, FL, January 8-13, 1996.
1995
1990
Heithmar, E M., T A. Hinners, J. T. Rowan, AND J. M. Riviello. MINIMIZATION OF INTERFERENCES IN INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY. Analytical Chemistry 62(8):857-864, (1990).
1989
Hinners, T A., E M. Heithmar, L C. Butler, M. Hurd, D. E. Dobb, AND G. A. Laing. PERFORMANCE OF INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY METHOD 6020. Presented at the Fifth Annual Waste Testing and Quality Assurance Symposium, July 24-28, 1989.
1988
Hinners, T A., E M. Heithmar, L Butler, J. Henshaw, D. E. Dobb, G. A. Laing, AND D. Cardenas. DEVELOPMENT OF ICP-MS METHOD 6020. Presented at US EPA Symposium on Waste Testing and Quality Assurance, July 11-15, 1988.
1987
Hinners, T A., E M. Heithmar, T. M. Spittler, AND J. Henshaw. INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRIC DETERMINATION OF LEAD ISOTOPES. Analytical Chemistry 59(22):2658-2662, (1987).


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