Dr. Herbert J. TobiasResume/Curriculum Vitae, 2015Page 1

Dr. Herbert J. Tobias

B36 Savage Hall, Cornell University, Ithaca NY 14853 USA

Cell phone: 1-510-295-3379e-mail: S Citizen

SUMMARYExtensive experience in analytical instrumentation, methodsdevelopment and applications to novel measurements in order to advance research and monitoring in a wide variety of disciplines, such asthe characterization of combustion engine emissions, atmospheric aerosols, bio-aerosols, airborne pathogens, stable isotopes, biomolecules, sport anti-doping, MEMS technology for analytic instrumentation,and environmental monitoring. Always open to learn, investigate, and apply new techniques to a broad range of scientific investigations.

EDUCATION

  • Cornell University, NY, Ph.D. (Analytical Chemistry, 1997)
  • Cornell University, NY, M.S. (Analytical Chemistry, 1994)
  • College of William & Mary, VA, B.S. (Chemistry, 1992)

OVERVIEW OF EXPERIENCE AND SKILLS

Analysis Techniques- developed and applied analytical techniques including:

  • Separations such as gas chromatography (GC), thermal desorption,and comprehensive 2D GC.
  • Ionization techniques such as electron impact (EI), chemical (CI), and laser desorption ionization (LDI).
  • Mass spectrometry (MS) instrumentation such as quadrupole, time-of-flight (TOF), and magnetic sector, including isotope ratio MS, single particle MS, aerosol particle beam MS, and GC-MS.
  • Aerosol generators, particle sizers, differential mobility analyzers, and particle collectors.

Teamwork- worked extensively as part of a team and in a results oriented environment, alongside a multidisciplinary group of professionals.

Oral presentations- of research in seminars, conferences, funding reviews, invited talks, and group meetings.

Teaching & Guidance- Taught various courses at Cornell (Labs: 1992-1996; Lectures: 1996,2008, 2010, 2012) and assisted in management & guidance over students at UCR, LLNL, and Cornell.

EMPLOYMENT

1/07-current Senior Research Associate (2010-present); Research Associate (2007-2009), Division of Nutritional Sciences, Cornell University.

Development of standards and techniques for the detection of the use of exogenous anabolic steroids from urine in sport doping, gas chromatography mass spectrometry (GC-MS), comprehensive 2D gas chromatography (GCxGC)-MS, GC-combustion stable isotope mass spectrometry (IRMS)measurements (GC-IRMS),novel instrumentation for GCxGC separations coupled to IRMS andposition specific isotopic analysis.Micro-fabrication of micro-reactors, and single particle aerosol mass spectrometry and X-ray free electron laser imaging.

Duties & Responsibilities

  • Author, Co-Author grant proposals to fund research, salary.
  • Management, training, and guidance of students in research.
  • Conduct cutting edge research in advanced two-dimensional gas chromatography (GCxGC) separations coupled with MS and on-line combustion high precision isotope ratio mass spectrometry (IRMS) of urinary steroids, and MEMS technology (using the Cornell NanoScale Science & Technology Facility) for combustion micro-reactor development for isotopic analysis.
  • Build, maintain and troubleshoot laboratoryseparation and mass spectrometer systems, such as GC-MS, GC-C-IRMS, and GCxGC-C-IRMS.
  • Key methodologies include GC, EI, magnetic sector MS, on-line chemistry, MEMS.
  • Procure laboratory consumables and equipment as needed.
  • Author manuscripts for peer review and publication.
  • Review grant proposals for NASA, WADA, and EPA, and review manuscripts submitted toa multitude of peer review journals.
  • Present research results at meetings and conferences.

11/01-12/06 Aerosol Chemist, BioSecurity & Nanoscience Laboratory in the Chemical & Material Sciences Division, Lawrence Livermore National Laboratory (LLNL), University of California.

Development and application ofSingle Particle Aerosol Mass Spectrometry(using laser desorption ionization time-of-flight)for the rapid detection of bio-aerosols and environmental monitoring & characterization of atmospheric particulates.

Duties & Responsibilities

  • Co-Authored grant proposals to fund research.
  • Conducted cutting edge research, in the development of analytical methodology (including mass spectrometry) for the detection of bio-aerosols of concern to national security and public health.
  • Built, maintained, and troubleshot lab built mass spectrometer systems, in this case advanced single particle aerosol mass spectrometers. Maintain and troubleshoot other equipment, such as particle sizers, advanced aerosol generators, particle collectors.
    Key methodologies included LDI, MALDI, TOF-MS, particle sizing and sampling.
  • Managed large project subsection deliverables and finances.
  • Helped to lead instrument deployments to field sites and operations at government test beds for systems testing, such as SFO airport & Johns Hopkins Applied Physics Lab.
  • Managed, trained, and guided students in research.
  • Procured lab consumables and equipment as needed.
  • Authored manuscripts for peer review and publication.
  • Reviewed manuscripts for peer review journals and funding agencies.
  • Presented research results at meetings and conferences.

04/97-09/01 Postdoctoral Researcher, Air Pollution Research Center, University of California at Riverside (UCR).

Development and application of Thermal Desorption Particle Beam Mass Spectrometry to fundamental laboratory studies of smog formation and the characterization of diesel engine exhaust.

Duties & Responsibilities

  • Conducted cutting edge research, in the development of analytical methodology for the study of organic aerosol formation and diesel exhaust nano-particle emissions of interest in air pollution.
  • Built, maintained, and troubleshot lab built mass spectrometer system, in this case a thermal desorption particle beam mass spectrometer, and other equipment, such as differential mobility analyzers, particle counters, and a 7000 liter environmental chamber.
  • Key methologies included EI, thermal vaporization, quadrupole MS, particle sizing and sampling.
  • Procured lab consumables and equipment as needed.
  • Authored manuscripts for peer review and publication.
  • Presented research results at meetings and conferences.

09/92-3/97 Graduate Student/Research Assistant, Cornell University.

Development of first continuous-flow interface for compound-specific hydrogen isotopicanalysis of hydrogen, water, and organic mixtures using isotope ratio mass spectrometry.

PEER REVIEWEDPUBLICATIONS

Nisbet, M.; Tobias, H.J.; Brenna, J.T.; Sacks, G.; Mansfield, A.K. “Quantifying the Contribution of Grape Hexoses to Wine Volatiles by High Precision [U13C]-glucose Tracer Studies." Journal of Agricultural and Food Chemistry, 2014, 62, 6820-6827.

Park, H.J.; et.al. “Toward Unsupervised Single-Shot Diffractive Imaging of Heterogeneous Particles using X-ray Free-Electron Lasers.”Optics Express, 2013, 21, 28729.

Pedersoli, E.; et.al.“Mesoscale Morphology of Airborne Core-shell Nanoparticle Clusters: X-ray Laser Coherent Diffraction Imaging.” Journal of Physics B: Atomic, Molecular & Optical Physics, 2013, 46, 164033.

Loh, N.D.; et.al. “Sensing the Wavefront of X-ray Free-electron Lasers using Aerosol Spheres.” Optics Express, 2013, 21, 12385.

Zhang, Y.; Tobias, H.J.; Sacks, G.L.; Brenna, J.T. “Calibration and Data Processing in Gas Chromatography Isotope Ratio Mass Spectrometry.” Drug Testing and Analysis, 2012, 4, 912-922.

Zhang, Y.; Tobias, H.J.; Brenna, J.T. “Highly Sensitive and Selective Analysis of Urinary Steroids by Comprehensive Two-Dimensional Gas Chromatography Combined with Positive Chemical Ionization Quadrupole Mass Spectrometry.” Analyst, 2012, 137, 3102-3110.

Loh, N.D.; et.al. “Fractal Morphology, Imaging and Spectrometry of Single Aerosol Particles in Flight.” Nature, 2012,486, 513-517.

Zhang, Y.; Tobias, H.J.; Auchus, R.J.; Brenna, J.T. “Comprehensive Two Dimensional Gas Chromatography Fast Quadrupole Mass Spectrometry (GC×GC-qMS) for Urinary Steroid Profiling. Mass Spectral Characteristics with Chemical Ionization.” Drug Testing and Analysis, 2011, 3, 857-867.

Tobias, H.J.; Zhang, Y.; Auchus, R.; Brenna, J.T. "Detection of Synthetic Testosterone Use by Novel Comprehensive Two-Dimensional Gas Chromatography Combustion Isotope Ratio Mass Spectrometry (GC×GCC-IRMS),"Analytical Chemistry, 2011, 83, 7158–7165.

Tobias, H.J.; Brenna, J.T. “Microfabrication of Micro-Reactors for Isotope Ratio Mass Spectrometry,” Microfluidics and Nanofluidics, 2010, 9, 461-470.

Zhang, Y; Tobias, H.J.; Brenna, J.T. “Uniform Steroid Isotopic Standards for Gas Chromatography Combustion Isotope Ratio Mass Spectrometry,” Steroids,2009, 74, 369-378.

Tobias, H.J.; Sacks, G.L.; Zhang, Y.; Brenna, J.T. “Comprehensive Two-Dimensional Gas Chromatography Combustion Isotope Ratio Mass Spectrometry,” Analytical Chemistry,2008,80, 8613-8621.

Zhang, Y; Tobias, H.J.; Brenna, J.T. “Uniform Isotopic Standards for Gas Chromatography Combustion Isotope Ratio Mass Spectrometry of Steroids,” Recent Advances in Doping Analysis,2008, 16, 171-180.

Tobias, H.J.; Sacks, G.L.; Zhang, Y.; Brenna, J.T. “Progress Towards Comprehensive 2D Gas Chromatography Combustion Isotope Ratio Mass Spectrometry (GCxGC),”Recent Advances in Doping Analysis, 2008,16, 153-162.

McJimpsey, E.L.; Jackson, W.M.; Lebrilla, C.B.; Tobias, H.J.; Bogan, M.J.; Gard, E.E.; Frank, M.; Steele, P.T. "Parameters Contributing to Efficient Ion Generation in Aerosol MALDI Mass Spectrometry," Journal of the American Society for Mass Spectrometry, 2008, 19, 315-324.

Farquar, G.R.; Steele, P.T.; McJimpsey, E.L.; Lebrilla, C.B.; Tobias, H.J.; Gard, E.E.; Frank, M.; Coffee, K.; Riot, V.; Fergenson, D.P. “Supramicrometer particle shadowgraph imaging in the ionization region of a single particle aerosol mass spectrometer.” Journal of Aerosol Science,2008, 39, 10-18.

Bogan, M.J.; Patton, E.; Srivastava, A.; Martin, S.; Fergenson, D.P.; Steele, P.T.;Tobias, H.J.; Gard, E.E.; Frank, M. “Online aerosol mass spectrometry of single micrometer-sized particles containing poly(ethylene glycol).” Rapid Communications in Mass Spectrometry,2007, 21, 1214-1220.

Tobias, H.J., Pitesky, M.; Fergenson, D.P.; Steele, P.T.; Horn, J.; Frank, M.; Gard, E.E. ”Following the biochemical and morphological changes of Bacillus atrophaeus cells during the sporulation process using Bioaerosol Mass Spectrometry.” Journal of Microbiological Methods,2006, 67, 56-63.

Ferge, T.; Karg, E.; Schroppel, A.; Coffee, K.R.; Tobias, H.J.; Frank, M.; Gard, E.E.; Zimmerman, R. “Fast Determination of the Relative Elemental and Organic Carbon Content of Aerosol Samples by Single-Particle Aerosol Time-of-Flight Mass Spectrometry.” Environmental Science and Technology, 2005, 40, 3327-3335.

Steele, P.T.; Srivastava, A.; Pitesky, M.E.; Fergenson, D.P.; Tobias, H.J.; Gard, E.E.; Frank, M. “Desorption/Ionization Fluence Thresholds and Improved Mass Spectral Consistency Measured Using a Flattop Laser Profile in the Bioaerosol Mass Spectrometry of Single Bacillus Endospores.” Analytical Chemistry,2005, 77, 7448-7454.

Tobias, H.J., Schafer, M.P., Pitesky, M. Fergenson, D.P., Horn, J., Frank, M., Gard, E.E. ”Bioaerosol Mass Spectrometry (BAMS) for the Rapid Detection of Individual Airborne Mycobacterium tuberculosis H37Ra Particles.” Applied and Environmental Microbiology,2005, 71, 6086-6095.

Srivastava, A., Pitesky, M., Steele, P.T., Tobias, H.J., Fergenson, D.P., Horn, J.M., Russell, S.C., Czerwieniec, G.A., Lebrilla, C.B., Gard, E.E. and Frank, M. “Comprehensive Assignment of Mass Spectral Signatures from Individual Bacillus atrophaeus Spores in Matrix-free Laser Desorption/Ionization Bioaerosol Mass Spectrometry.” Analytical Chemistry, 2005, 77, 3315-3323.

Czerwieniec, G., Russell, S., Tobias, H.J., Pitesky, M., Fergenson, D., Steele, P.T., Srivastava, A., Horn, J., Frank, M., Gard, E.E. Lebrilla, C. ”Stable Isotope Labeling of Entire Bacillus atrophaeus Spores and Vegetative Cells Using Bioaerosol Mass Spectrometry.” Analytical Chemistry, 2005, 77, 1081-1087.

Russell, S., Czerwieniec, G., Tobias, H.J., Fergenson, D., Steele, P.T., Pitesky, M., Horn, J., Srivastava, A., Frank, M., Gard, E.E. Lebrilla, C. ”Toward Understanding the Ionization of Biomarkers from Micrometer Particles by Bio-Aerosol Mass Spectrometry.” Journal of the American Society for Mass Spectrometry,2004, 15, 900-909.

Fergenson, D., Pitesky, M., Tobias, H.J., Steele, P.T., et. al., E.E. ”Detection and Classification of Individual Bioaerosol Particles.” Analytical Chemistry,2004, 76, 373-378.

Sakurai, H., Tobias, H.J., Park, K., M., Zarling, D., Docherty, K.S., Kittelson, D.B., McMurry, P.H.,

Ziemann, P.J. ”On-Line Measurements of Diesel Nanoparticle Composition, Volatility, and Hydroscopicity.” Atmospheric Environment,2003, 37, 1199-1210.

Steele, P.T., Tobias, H.J., Fergenson, D.P., Pitesky, M., Horn, J., Czerwieniec, G., Russell, S., Lebrilla, C., Frank, M., Gard, E.E. “Laser Power Dependence of Mass Signatures from Individual Bacterial Spores in Bioaerosol Mass Spectrometry.” Analytical Chemistry,2003, 75, 2480-2487.

Chattopadhyay, S.; Tobias, H.J.; Ziemann, P.J. "A Method for Measuring Vapor Pressures of Low-Volatility Organic Aerosol Compounds Using a Thermal Desorption Particle Beam Mass Spectrometer." Analytical Chemistry.2001, 73, 3797-3803.

Tobias, H.J.; Ziemann, P.J. "Kinetics of the Gas-Phase Reactions of Alcohols, Aldehydes, Carboxylic Acids, and Water with the C13 Stabilized Criegee Intermediate formed from Ozonolysis of 1-Tetradecene." Journal of Physical Chemistry A,2001, 105, 6129-6135.

Tobias, H.J., Beving, D.E., Ziemann, P.J., Sakurai, H., Zuk, M., McMurry, P.H., Zarling, D., Waytulonis, R., Kittelson, D.B. “Chemical Analysis of Diesel Engine Nanoparticles Using a Nano-DMA/Thermal Desorption Particle Beam Mass Spectrometer.” Environmental Science and Technology,2001, 35, 2233-2243.

Tobias, H.J; Docherty, K.S.; Beving, D.E.; Ziemann, P.J. “Effect of Relative Humidity on the Chemical Composition of Secondary Organic Aerosol Formed from Reactions of 1-Tetradecene and Ozone.” Environmental Science and Technology, 2000, 34, 2116-2125.

Tobias, H.J; Ziemann, P.J. “Thermal Desorption Mass Spectrometric Analysis of Organic Aerosol Formed from Reactions of 1-Tetradecene and Ozone in the Presence of Alcohols and Carboxylic Acids.” Environmental Science and Technology, 2000, 34, 2105-2115.

Tobias, H.J.; Kooiman, P.M.; Docherty, K.S.; Ziemann, P.J. “Real-Time Chemical Analysis of Organic Aerosols Using a Thermal Desorption Particle Beam Mass Spectrometer.” Aerosol Science and Technology, 2000, 33, 170-190.

Tobias, H.J.; Ziemann, P.J. “Compound Identification in Organic Aerosols Using Temperature-Programmed Thermal Desorption Particle Beam Mass Spectrometry.” Analytical Chemistry,1999, 71, 3428-3435.

Brenna, J.T.; Corso, T.N.; Tobias, H.J.; Caimi, R.J. “High-Precision Continuous-Flow Isotope Ratio Mass Spectrometry.” Mass Spectrometry Reviews, 1997, 16, 227-258.

Tobias, H.J.; Brenna, J.T. “On-Line Pyrolysis as a Limitless Reduction Source for Isotopic Analysis of Organic Derived Hydrogen.” Analytical Chemistry,1997, 69, 3148-3152.

Tobias, H.J.; Brenna, J.T. “High-Precision D/H Measurement from Organic Mixtures by Gas Chromatography Continuous-Flow Isotope Ratio Mass Spectrometry Using a Palladium Filter.” Analytical Chemistry, 1996, 68, 3002-3007.

Tobias, H.J.; Brenna, J.T. “Correction of Ion Source Nonlinearities over a Wide Signal Range in Continuous-Flow Isotope Ratio Mass Spectrometry of Water Derived Hydrogen.” Analytical Chemistry, 1996, 68, 2281-2286.

Tobias, H.J.; Goodman, K.J.; Blacken, C.E.; Brenna, J.T. “High-Precision D/H Measurement from Hydrogen Gas and Water by Continuous-Flow Isotope Mass Spectrometry” Analytical Chemistry, 1995, 67, 2486-2492.

BOOK CHAPTERS

Frank, M.; Gard, E.; J. Tobias, H.J.; Adams, K.L.; Bogan, M.J.; Coffee, K.R.; Farquar, G.R.; Fergenson, D.P; Martin, S.; Pitesky, M.; Riot, V.J.; Srivastava, A.; Steele, P.; Williams, A.M. “Single-Particle Aerosol Mass Spectrometry (SPAMS) for High-Throughput and Rapid Analysis of Biological Aerosols and Single Cells,” in Rapid Characterization of Microorganisms by Mass Spectrometry,Fenselau, C. (ed), ACS Symposium Series Vol. 1065; American Chemical Society: Washington, DC, 2011, Chapter 10, pp. 161-196. (Peer Reviewed Chapter).

Schaldach, C.M.;deYoreo, J.J.;Esposito, A.;Fergenson, D.P.;Gard, E.;Hollars, C.;Huser, Thomas;Lane, S.M.;Malkin, A.J.;Pitesky, M.;Talley, C.;Tobias, H.J.; Woods, B. ; Bench, G. ; Grant, P. ; Kashgarian, M. ; Knezovich, J. ; Ferreira, J. ; Wu, K.-J. ; Horn, J. ; Velsko, S.P. “Non-DNA Methods for Biological Signatures.” In Microbial Forensics. Breeze RG, Budowle B, Schutzer SE (Eds); Elsevier Academic Press, Burlington, 2005, pp. 262–295.

Brenna, J.T.; Tobias, H.J.; Corso, T.N. "High-Precision D/H Measurements from Organicsand Position-Specific Carbon Isotope Analysis." inStable Isotopes and the Integration of Biological, Ecological, and Geochemical Processes, Griffiths, H. (ed), Bios Scientific Publishers: Oxford, UK,1998, Chapter 1, pp.1-12.ISBN: 1-85996-135-5.

INSTITUTIONAL SEMINARS AND INVITED LECTURES

Lawrence Livermore National Laboratory, Livermore CA, June 21, 2010.

SLAC National Accelerator Laboratory, Stanford University, Palo Alto CA, October 23, 2009.

Department of Chemical Engineering, Clarkson University, Potsdam NY, July 1, 2008.

Bio-Security & Nano-Sciences, Lawrence Livermore National Lab, September 12, 2005.

Engineering and Engineering Sciences, Los Alamos National Laboratory, March 23, 2004.

Chemical Biology & Nuclear Sciences, Lawrence Livermore National Lab, February 11, 2004.

Chemical & Material Sciences Symposium, Lawrence Livermore National Lab, July 16, 2003.

Bio-Security & Nano-Sciences, Lawrence Livermore National Lab, November 4, 2002.

Department of Mechanical Engineering, University of Minnesota, Nov 17, 2000.

ORAL PRESENTATIONS ATCONFERENCES

Tobias, H.J.; Zhang, Y.; Brenna, J.T. “Comprehensive Two Dimensional Gas Chromatography Coupled to IRMS: Considerations and Developments in Instrumentation and Analysis.” Joint European Stable Isotope Users Meeting, Leipzig Germany, Sept. 2-7, 2012.

Tobias, H.J.; Sacks, G.L.; Zhang, Y.; Brenna, J.T. “Coupling Comprehensive Two Dimensional Gas Chromatography to Isotope Ratio Mass Spectrometry.” Continuous Flow-Isotope Ratio M.S. Workshop, Ithaca NY, June 28-July 1, 2009.

Tobias, H.J., Pitesky, M.; Fergenson, D.P.; Horn, J.; Frank, M.; Gard, E.E. ”Following the biochemical and morphological changes of Bacillus atrophaeus cells during the sporulation process using Bioaerosol Mass Spectrometry.” ASMS Conference on Mass Spectrometry and Allied Topics, Seattle WA, May 28-June 1, 2006.

Tobias, H.J., Schafer, M.; Pitesky, M.; Fergenson, D.P.; Horn, J.; Frank, M.; Gard, E.E. ”Quantitative Evaluation of Bioaerosol Mass Spectrometry for the Real-Time Detection of Individual Airborne Mycobacterium tuberculosis H37Ra Particles.” ASMS Conference on Mass Spectrometry and Allied Topics, Nashville TN, May 23-27, 2004.

Tobias, H.J.; Docherty, K.S.; Beving, D.E.; Chattopadhyay, C.; Ziemann, P.J. “Relative Rates of the Aerosol Products Formed from the Ozonolysis of 1-Tetradecene in the Presence of Alcohols, Carboxylic Acids, and Water.” American Association for Aerosol Research 2000-19th Annual Conference. St. Louis, MO, Nov 6-10, 2000.

Tobias, H.J.; Beving, D.E., Ziemann, P.J., Sakurai, H., Zuk, M., McMurry, P.H., Zarling, D., Waytulonis, R., Kittelson, D.B. “Nano-DMA/Thermal-Desorption Particle-Beam Mass Spectrometric Analysis of Nanoparticles Produced in Diesel Exhaust.” 220th ACS National Meeting. Washington DC, Aug. 20-24, 2000.

Tobias, H.J.; Docherty, K.S.; Beving, D.E.; Ziemann, P.J. “Thermal Desorption Particle Beam Mass Spectrometry as a Novel Tool for Secondary Organic Aerosol Analysis.” The 48th ASMS Conference on Mass Spectrometry and Allied Topics. Long Beach, CA, June 11-15, 2000.

Tobias, H.J.; Ziemann, P.J. American Association for Aerosol Research 1999-18th Annual Conference. “Identification and Real-Time Quantitative Analysis of Secondary Organic Aerosol Using Thermal Desorption Particle Beam Mass Spectrometry.” Tacoma, WA, Oct. 12-15, 1999.

Tobias, H.J.; Docherty, K.S.; Beving, D.E.; Ziemann, P.J. “Smog Chamber Studies of the Chemistry of Secondary Organic Aerosol Formation.” 35th ACS Western Regional Meeting. Ontario, CA, Oct. 6-8, 1999.

Tobias, H.J.; Kooiman, P.M.; Docherty, K.S.; Ziemann,P.J. “Identification and Quantification of Organic Aerosol Composition Using Thermal Desorption Particle Beam Mass Spectrometry.” 16th Annual Symposium on Kinetic and Photochemical Processes in the Atmosphere. Los Angeles, CA, Feb. 18, 1999.

Tobias, H.J.; Brenna, J.T. "Hydrogen Isotopic Analysis of H2O and Organic Mixtures Using Compound-Specific Continuous-Flow Isotope Ratio Mass Spectrometry." The 3rd Canadian CF-IRMS Workshop. Saskatoon, SK, Sept. 9-11, 1996.

Tobias, H.J.; Brenna,J.T. "High-Precision D/H Measurement From Organic Mixtures By Continuous-Flow IRMS Using A Pd Filter." The 44th ASMS Conference on Mass Spectrometry and Allied Topics. Portland, OR, May 12-16, 1996.

Tobias, H.J.; Goodman, K.J.; Blacken, C.E.; Brenna, J.T. "High Precision D/H Measurements From H2 Gas and H20 By Continuous-Flow IRMS." 210th ACS National Meeting. Chicago, IL, Aug. 20-24, 1995.

Tobias, H.J.; Goodman, K.J.; Blacken, C.E.; Brenna, J.T. "High-Precision Continuous-Flow D/H Measurement from Hydrogen Gas and Water." Proceedings: The 43rd ASMS Conference on Mass Spectrometry and Allied Topics. Atlanta, GA, May 21-26, 1995 p.46.

OTHER PRESENTATIONSAT CONFERENCES (Co-Authored PRESENTATIONS & POSTERS)

Tobias, H.J.; Ruesch, J.M.; Brenna, J.T. "High Volume Steroid Stable Isotopic Standards for Anti-Doping Applications,” 63ndASMS Conference on Mass Spectrometry and Allied Topics, St. Louis MO, May31-June 4, 2015.

Ruesch, J.M.; Tobias, H.J.; Brenna, J.T. "Extraction of Lactic Acid from Human Plasma for Robust Stable Isotopic Analyses,” 63ndASMS Conference on Mass Spectrometry and Allied Topics, St. Louis MO, May31-June 4, 2015.

Mansfield, A.K.; Nisbett, M.; Tobias, H.J.; Brenna, J.T.; Sacks, G.L. “Determining the Origin of Fermentation Volatiles Using Labeled Glucose Tracers and High-Precision Isotope Ratio Analyses,” 65th American Society for Enology & Viticulture (ASEV) National Conference and 39th ASEV Eastern Section Annual Meeting, Houston TX, June 23-27, 2014.

Tobias, H.J.; Ruesch, J.M.; Brenna, J.T. "GC-Pyrolysis-GC Coupled to Combustion Isotope Ratio Mass Spectrometry for Position Specific Isotope Ratio Mass Spectrometry,” 62ndASMS Conference on Mass Spectrometry and Allied Topics, Baltimore MD, June 15-19, 2014.

Brenna, J.T. ; Tobias, H.J.; Reusch, J.M. “Progress and Promise Toward Automated Intramolecular High Precision IRMS,” Gordon Research Conference: Isotopes in Biological and Chemical Sciences, Galveston TX, February 2-7, 2014.

Tobias, H.J.; Patten, C.; Brenna, J.T. "On-line Micro-Reactors for Gas Chromatography Isotope Ratio Mass Spectrometry,” 61stASMS Conference on Mass Spectrometry and Allied Topics, Minneapolis MN, June 9-13, 2013.

Tobias, H.J.; Brenna, J.T. "On-line Pyrolysis of Propylene Glycol for Isotope Ratio Mass Spectrometry to Enable Position Specific Isotopic Analysis,” International Separation Science Society CASSS Joint Congress, Palm Springs CA, May 12-15, 2013.