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Records 26 to 50 of 51 records from author Charlita Rosal

2007
ROSAL, C. G. EMERGING CONTAMINANTS: AN OVERVIEW OF ON-GOING RESEARCH. Presented at 17th Annual Quality Assurance Conference, Dallas, TX, October 15 - 19, 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. AND G. MOMPLAISIR. DETERMINATION OF PESTICIDE RESIDUES IN BIOLOGICAL EXTRACTS BY RETENTION TIME LOCKING CAPILLARY GAS CHROMATOGRAPHY MASS SPECTROMETRY. Presented at 28th International Symposium on Capillary Chromatography and Electrophoresis, Las Vegas, NV, May 22 - 25, 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.
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.
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
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
Rosal, C G. AGENT 00BEES: SPIES IN YOUR BACKYARD. Presented at EPA-LV Research Expo, Las Vegas, NV, October 10, 1998.
1996
Borden, R. C., R. T. Goin, C. M. Kao, AND C G. Rosal. ENHANCED BIOREMEDIATION OF BTEX USING IMMOBILIZED NUTRIENTS: FIELD DEMONSTRATION AND MONITORING. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-96/145 (NTIS PB97-186290), 1996.
Denne, J E., L A. Eccles, E J. Englund, S P. Gardner, A T. Mazzella, J M. Nocerino, C G. Rosal, B A. Schumacher, J J. van Ee, AND K E. Varner. RESEARCH AT THE U.S. EPA'S CHARACTERIZATION AND ASSESSMENT PROGRAM. Presented at Invited Presentation for the University of Nevada Water Resources 706 Class, Las Vegas, NV, November 13, 1996.