Publications

  • Patel, J., Sharma, A., Vozka, P. (March, 2025). Enhancing Olefin Quantification in Plastic-Derived Fuels Using GCxGC-FID Through Optimized Derivatization Techniques. Oral presentation at the ACS Spring 2025, San Diego, CA
     
  • Barzallo, G., Gieng, H., Patel, J., Sharma, A., Vozka, P. (August, 2024). Understanding Olefin Content in Plastic Waste Depolymerization Products: Current Knowledge and Research Gaps. Oral presentation at the ACS Fall 2024, Denver, CO
  • Barzallo, G., Gieng, H., Vozka, P. (August, 2024). Advancements in Quantitative Analysis of Aliphatic Olefins: From Petroleum Fractions to Plastic-Waste Derived Alternative Fuels using GCxGC-FID. Oral presentation at the ACS Fall 2024, Denver, CO

  • Ruland, J., Champesi, P., Sharma, N., Martinez-Maldonado, J., Vozka, P., Cutz, L. (April, 2024). Catalytic Hydrothermal Liquefaction of Polystyrene: A Subcritical Approach for Recovery of High-Value Products. Oral presentation at 1st International Conference on Thermochemical Recycling of Plastics, Malaga, Spain

  • Barzallo, G., Gieng, H., Vozka, P. (March, 2024). GCxGC-FID Quantification of Olefins in Alternative Fuels Produced from Plastic Waste Conversion. Oral presentation at the 32nd Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA

  • Barzallo, G., Gieng, H., Vozka, P. (January, 2024). Alkene Quantification in Plastic Waste-Derived Alternative Fuels using GC×GC-FID. Oral presentation at the15th Multidimensional Chromatography Workshop, Los Angeles, CA

  • Barzallo, G., Gieng, H., Vozka, P. (August, 2023). Quantitative Analysis of Olefins in Gasoline-Like Alternative Fuels Made from Conversion of Plastic Waste via GC×GC-FID. Oral presentation at the ACS Fall 2023, San Francisco, CA
  • Mancia, B., Vozka, P. (August, 2023). Analysis of Organic Compounds Adsorbed by Plastic Waste from the Salton Sea and LA River. Oral presentation at the 2023 CSULA REU Urban Hydrology Conference
  • Thuesday, S., Lam, C., Segura, A., Vozka, P. (August, 2023). Analytical Method of Determining Compounds Adsorbed on Polyethylene and Polyethylene Terephthalate Microplastics in Three Environments. Oral presentation at the ASSURE Summer Research Presentation Forum
  • Barzallo, G., Vozka, P. (March, 2023). Quantitative Analysis of Olefins in Alternative Fuels made from Conversion of Plastic Waste via GCxGC-FID. Oral presentation at the 31st Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
     
  • Mosham, E., Vozka, P. (October 2022) Detecting Hydrocarbons in Sand after Huntington Beach Oil Spill using Solid-Phase Microextraction Gas Chromatography-Mass Spectrometry. Oral presentation at the CSU COAST 2022 Annual Meeting, Long Beach, CA
  • Cacciatore, J., Vozka, P., Caceres-Martinez, L., Daneshkhah, A., Agarwal, M., Kilaz, G., Dietz, E. (October, 2022). Characterization of Volatile Markers in Electronic Components Via Comprehensive Gas Chromatography with Electron Ionization Time-of-Flight Mass Spectrometry. Oral presentation at the 8th IAJC, Orlando, FL
  • Barzallo, G., Gieng, H., Luu, E. N., Auersvald, M., Straka, P., Vozka, P. (August 2022). Quantitative analysis of Aliphatic Olefins in Alternative and Petroleum-Based Fuels by Comprehensive Two-Dimensional Gas Chromatography. Oral presentation at the ACS Fall 2022, Chicago, IL
  • King, T., Vozka, P. (August, 2022). Accumulation of Organic Compounds by Polypropylene and Polyethylene Terephthalate Microplastic Samples. Oral presentation at the 2022 CSULA REU Urban Hydrology Conference  
  • Straka, P., Kittel, H., Auersvald, M., Vrtiška, D., Vozka, P. (May, 2022). Hydroprocessing of scrap tyres pyrolysis oil. Oral presentation at the 23rd edition of the International Conference on Analytical and Applied Pyrolysis, Ghent, Belgium
  • Barzallo, G., Gieng, H., Luu, E., Vozka, P. (April, 2022). Quantitative Analysis of Olefins in Petroleum Fractions by Comprehensive Two-Dimensional Gas Chromatography. Oral presentation at the 36th Annual CSU Systemwide Student Research Competition, San Francisco, CA
  • Mirzaie, C., Milbourne, A., Vozka, P. (April, 2022). Effect of n-Alkane Addition on the Freezing Point of Alternative Aviation Fuel Blending Components. Oral presentation at the National Conference on Undergraduate Research (NCUR)
  • Barzallo, G., Gieng, H., Luu, E., Vozka, P. (March, 2022). Quantitative Analysis of Olefins in Petroleum Fractions by Comprehensive Two-Dimensional Gas Chromatography. Oral presentation at the 30th Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA - 3rd Best Overall Oral Presentation
  • Milbourne, A., Mirzaie, C., Vozka, P. (March, 2022). Effect of n-C18 Addition on the Freezing Point of Alternative Aviation Fuel Blending Components. Oral presentation at the 30th Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
 

  • Martinez-Maldonado, J., Ulloa, O., Vozka, P. (March, 2025). Comparative Analysis of Polystyrene Depolymerization Products from Low-Pressure Hydrothermal Processing and Hydrothermal Liquefaction via GC-MS/FID. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Flade, K., Tran, A., Vozka, P. (March, 2025). GCxGC-TOF/MS Analysis of Polycyclic Aromatic Hydrocarbons (PAH) in Seaside Sparrows Pos-Deepwater Horizon spill. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Venegas, N., Vozka, P. (March, 2025). Analyzing Microplastic Samples from Beaches in Southern California Using Py-GCxGC-TOF/MS. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Sharma, A., Patel, J., Vozka, P. (March, 2025). Innovative Quantification or Aromatic Olefins in Alternative Fuels and Oils from Plastic Waste Using GCxGC-FID and Derivatization Techniques. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Ramirez, R., Heidecker, M., Ulloa, O., Vozka, P. (March 2025). Advancing Fingerprint Deposition Aging Model Using  GC-TOF/MS of Fingerprints Under Exposure to Different Light Sources. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Morales, K., Vozka, P. (March 2025). Microplastic Pollution on California Beaches: An Emerging Environmental Concern. Poster presentation at the ACS Spring 2025, San Diego, CA
  • Heidecker, M., Ramirez, R., Vozka, P. (February 2025). Investigating Latent Fingerprints under Exposure to Different Light Sources using Gas Chromatography Paired with Time-of-Flight Mass Spectrometry (GC-TOF/MS). Poster presentation at the 33rd Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
  • Brieu, N., Agbulut, U., Vozka, P. (February 2025). Hydrogen-Rich Syngas Production: Utilizing Waste Heat in Methanol Steam Reforming. Poster presentation at the 33rd Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA - Outstanding Poster Presentation
     
  • Kuramura, E., Guerra, A., Patel, J., Vozka, P. (November 2024). Alkene Derivatization and Quantification of Pyrolysis Plastic Waste Fuel. Poster Presentation at Murdock College Science Research Conference, Vancouver, WA
  • Patel, J., Sharma, A., Vozka, P. (August, 2024). Improving Derivatization Techniques and Quantitative Analysis of Olefins in Alternative Fuel Derived from Plastic Waste using GCxGC-FID. Poster presentation at the ACS Fall 2024, Denver, CO
  • Heidecker, M., Ramirez, R., Mosham, E., Roberts, K., Vozka, P. (August, 2024). Aged Squalene and Cholesterol Compounds in Latent Fingermarks Analyzed by Gas Chromatography Time-of-Flight Mass Spectrometry (GC-TOF/MS). Poster presentation at the ACS Fall 2024, Denver, CO
  • Hao, J.M., Agbulut, U., Vozka, P. (August, 2024). Methanol Steam Reforming: Aspen Hysys Parameter Optimization. Poster presentation at the 2024 SoCal Undergraduate Chemistry Research, Irvine, CA
  • Kuramura, E., Guerra, A., Patel, J., Vozka, P. (August, 2024). Alkene Derivatization and Quantification for Pyrolysis Plastic Waste Fuel. Poster presentation at the 2024 SoCal Undergraduate Chemistry Research, Irvine, CA
  • Guerra, A., Kuramura, E., Patel, J., Vozka, P. (August, 2024). Alkene Derivatization and Analysis for Pyrolysis Oil Samples. Poster presentation at the 2024 Summer Research Symposium, Los Angeles, CA - 1st place
  • Venegas, N., Vozka, P. (April, 2024). Analyzing Microplastics Samples from Beaches in Southern California using Pyrolysis-Comprehensive Two-Dimensional Gas Chromatography with Time-of-Flight Mass Spectrometry (Py-GCxGC-TOFMS). Poster presentation at the SoCal SETAC Annual Meeting, Lake Arrowhead, CA
  • Mosham, E., Ramirez, R., Heidecker, M., Roberts, K., Vozka, P. (April, 2024). Advancing Fingerprint Deposition Modeling through the Integration of Comprehensive Two-Dimensional Gas Chromatography and Time-of-Flight Mass Spectrometry for Age Estimation. Poster presentation at the 138th California Association of Criminalists, Los Angeles, CA
  • Mosham, E., Ramirez, R., Heidecker, M., Roberts, K., Vozka, P. (March, 2024). Advancing Fingerprint Deposition Modeling through the Integration of Comprehensive Two-Dimensional Gas Chromatography and Time-of-Flight Mass Spectrometry for Age Estimation. Poster presentation at the 32nd Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
  • Sharma, A., Patel, J., Vozka, P. (March, 2024). Improving Derivatization Techniques and Quantitative Analysis of Olefins in Alternative Fuels Derived from Plastic Waste Using GCxGC-FID. Poster presentation at the 32nd Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
  • Mosham, E., Ramirez, R., Roberts, K., Vozka, P. (January, 2024). Advancing Fingerprint Deposition Modeling through the Integration of Comprehensive Two-Dimensional Gas Chromatography and Time-of-Flight Mass Spectrometry for Age Estimation. Poster presentation at the15th Multidimensional Chromatography Workshop, Los Angeles, CA
  • Lam, C., Segura, A., Nasry, M., Chan, J., Vozka, P. (October, 2023). Analysis of Microplastics in Beach Samples by Gas Chromatography Time-of-Flight Mass Spectrometry (GC-TOFMS). Poster presentation at the COAST 2023 Annual Meeting, Long Beach, CA
  • Mosham, E., Nguyen, K., Vozka, P. (October, 2023). Huntington Beach Oil Spill Analysis Using Solid-Phase Microextraction Gas Chromatography-Mass Spectrometry (SPME-GC-MS). Poster presentation at the COAST 2023 Annual Meeting, Long Beach, CA
  • Venegas, N., Casanova, S., Vozka, P. (September, 2023). Comparing Different SPME Fibers on Microplastic Standards Using GC-TOFMS. Poster presented at the MORE Programs' 12th Annual Research Retreat, Lake Arrowhead, CA
  • Milbourne, A., Vozka, P. (September, 2023). Assessment of Low-Pressure Hydrothermal Processing of Polystyrene Waste Using Gas Chromatography. Poster presented at the MORE Programs' 12th Annual Research Retreat, Lake Arrowhead, CA
  • Casanova, S., Venegas, N., Vozka, P. (September, 2023). Analyzing Organic Compounds Adsorbed by Microplastics: PP & PET. Poster presented at the MORE Programs' 12th Annual Research Retreat, Lake Arrowhead, CA
  • Gieng, H., Barzallo, G., Vozka, P. (August, 2023). Quantitative Analysis of Olefins in Petroleum Products using Comprehensive Two-Dimensional Gas Chromatography and ChromaTOF Tile. Poster presented at the ACS Fall 2023, San Francisco, CA
  • Casanova, S., Venegas, N., Vozka, P. (August, 2023). Analyzing Organic Compounds Adsorbed by Microplastics: PP & PET. Poster presented at the Bridges and REU Summer Poster Presentation, Los Angeles, CA
  • Milbourne, A. (April, 2023). Use of Sr(B,B’)O3 Perovskites for transparent semiconductors. Poster presentation at the 2023 Materials Research Society at San Francisco, CA (under the guidance of Dr. Dabo)
  • Mosham, E., Nguyen, K., Vozka, P. (March, 2023). Huntington Beach Oil Spill Analysis Using Solid-Phase Microextraction Gas Chromatography-Mass Spectrometry (SPME-GC-MS). Poster presentation at the 31st Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
  • Lam, C., Segura, A., Nasry, M., Chan, J., Vozka, P. (March, 2023). Analysis of Microplastics in Beach Samples by Gas Chromatography Time-of-Flight Mass Spectrometry (GC-TOFMS). Poster presentation at the 31st Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA
  • Barzallo, G., Vozka, P. (January, 2023). Quantitative analysis of alkenes in alternative fuels made from plastic waste conversion via comprehensive two-dimensional gas chromatography, 14th Multidimensional Chromatography Workshop, Liege, Belgium - Honorary Invitation
  • Barzallo, G., Gieng, H., Vozka, P.  (November, 2022). Quantitative Analysis of Alkenes in Alternative Fuels via Comprehensive Two-Dimensional Gas Chromatography. Poster presentation at the SCALACS Research Symposium at Caltech, Pasadena, CA
  • Mosham, E., Nguyen, K., Vozka, P.  (November, 2022). Analyzing Sand for Hydrocarbon Presence after Huntington Beach Oil Spill using Soling-Phase Microextraction Gas Chromatography-Mass Spectrometry (SPME-GC-MS). Poster presentation at the SCALACS Research Symposium at Caltech, Pasadena, CA - 2nd Best Overall Poster
  • Milbourne, A. (October, 2022). Use of Sr(B,B’)O3 Perovskites for transparent semiconductors. Poster presentation at the Conference Across MRSEC-PREM Schools in Columbus, OH (under the guidance of Dr. Dabo)
  • Dang, D. (August, 2022). Utilization of Metal-Organic Frameworks to Degrade Per- and Polyfluoroalkyl Substances in Aqueous Solutions. Poster presentation at the NSF REU program at CSULA, Los Angeles, CA (under the guidance of Dr. Liu)
  • Milbourne, A. (August, 2022). Use of Sr(B,B’)O3 Perovskites for transparent semiconductors. Poster presentation at the NSF REU program at Penn State University, State College, PA (under the guidance of Dr. Dabo)
  • Lam, C. (August, 2022). Effect of Oral Dihydromyricetin (DHM) on EtOH-Induced Lipid Accumulation in Alcohol-Associated Liver Disease (ALD). Poster presentation at the JumpStar at USC Graduate School, Los Angeles, CA (under the guidance of Dr. Davies)
  • Chan, J., Ramirez, R., Vozka, P. (March, 2022). Detailed Analysis of Contaminants in Samples Obtained from Talbert Marsh via GC×GC-FID Methods. Poster presentation at the 30th Annual Student Symposium on Research, Scholarship and Creative Activities (RSCA), Los Angeles, CA

  • Tran, D. K. P. 2025, Development of Stereocomplex Polylactic Acid Aerogel for Removing Polyethylene Terephthalate Microplastics in Water, Master's Thesis, California State University, Los Angeles, CA
  • Sharma, A. 2025, Quantitative Analysis of Aromatic Alkenes in Alternative Fuels Made from the Conversion of Plastic Waste by Comprehensive Two-Dimensional Gas Chromatography, Master's Thesis, California State University, Los Angeles, CA
  • Heidecker, M. 2025, Gas Chromatography Paired with Time-of-Flight Mass Spectrometry (GC-TOFMS) Analysis of Cholesterol and Squalene Decomposition Behavior in Aged Latent Fingerprints by Exposure to Different Light Sources, Undergraduate Thesis, California State University, Los Angeles, CA
     
  • Patel, J. 2024, Optimizing Derivatization Techniques to Improve Separation for Accurate Quantitative Analysis of Olefins in Fuels Derived From Plastic Waste, Master's Thesis, California State University, Los Angeles, CA
  • Gieng, H. 2024, Quantifying Olefins in Alternative Fuels using ChromaTOF Tile Analytical Software and Two-Dimensional Gas Chromatography, Master's Thesis, California State University, Los Angeles, CA
  • Barzallo, G. 2024, Quantitative Analysis of Aliphatic Olefins in Petroleum Fractions and Plastic Waste-Derived Alternative Fuels using Comprehensive Two-Dimensional Gas Chromatography with Flame Ionization Detection (GCxGC-FID), Master's Thesis, California State University, Los Angeles, CA
  • Ramirez, R. 2024, Compositional Analysis of Aging Latent Fingerprints/Time-Since Deposition Using GCxGC-TOFMS, Undergraduate Thesis, California State University, Los Angeles, CA
     
  • Nguyen, K. 2023, Identifying Hydrocarbon Compounds in Talbert Marsh Soil Samples after Huntington Beach Oil Spill by Gas Chromatography (Time-of-Flight) Mass Spectrometry, Undergraduate Thesis, California State University, Los Angeles, CA
     
  • Mirzaie, C. 2022, Effect of n-Alkane Addition on the Freezing Point of Alternative Aviation Fuel Blending Components, Undergraduate Thesis, California State University, Los Angeles, CA
  • Barzallo, G. 2022, Quantitative Analysis of Olefins in Petroleum Fractions by Comprehensive Two-Dimensional Gas Chromatography, Undergraduate Thesis, California State University, Los Angeles, CA

  • Vozka P. (December 2024). Investigating Alkene Content in Products from Plastic Waste Depolymerization: Current Knowledge, Research Gaps, and the Role of GCxGC–FID, Advances in Gas Chromatography: A Virtual Symposium, LCGC International 
     
  • Vozka P. (June 2023). Multidimensional chromatography in plastic waste pollution, NSF REU Summer 2023 Seminar Series, California State University, Los Angeles, CA
  • Vozka P. (January 2023). Multidimensional chromatography in plastic waste pollution, MORE Programs Spring 2023 Seminar Series, California State University, Los Angeles, CA
  • Vozka P. (January 2023). Quantitative analysis of aliphatic olefins in fuels made from plastic waste by comprehensive two-dimensional gas chromatography, 14th Multidimensional Chromatography Workshop, Liege, Belgium - Keynote Speaker
  • Vozka P. (January 25, 2023). Comprehensive Two-Dimensional Gas Chromatography (GC×GC) in the Analysis of Complex Chemical Mixtures, University of Chemistry and Technology, Prague, Czech Republic
     
  • Vozka P. (September 2022). Comprehensive Two-Dimensional Gas Chromatography in Fight Against Plastic Pollution, Seminar in Interdisciplinary STEM Research, California State University, Los Angeles, CA
  • Vozka P. (August 2022). (Two-dimensional) Gas chromatography in real-world applications, CHEM 5000, California State University, Los Angeles, CA
  • Vozka P. (July 2022). Plastic waste – what can we do about it?, STEM-NET Virtual Research Café 10.0, California State University, CA
  • Vozka P. (February 2022). Complex Chemical Mixtures - What is Inside of Them?, California State University, Long Beach, CA
  • Vozka P. (February 2022). Complex Chemical Mixtures - What is Inside of Them?, Chapman University, CA
  • Vozka P. (July 2021). Chemical composition analysis of complex mixtures by comprehensive two-dimensional gas chromatography, 2021 Summer Teacher Workshop (RET Program), Sustainability in Materials Science Research for the Classroom and Beyond, Pennsylvania State University, Materials Research Science & Engineering Centers
  • Vozka P. (October 2021). Chemical composition analysis of products from plastic waste conversion using comprehensive two-dimensional gas chromatography, CHEM 4890, Molecular Science Capstone, CSULA
  • Vozka P. (January 2021). Chemical composition analysis of complex mixtures by comprehensive two-dimensional gas chromatography, 3rd Science Exploration Workshop, MORE Program, CSULA

  • Vozka, P. (2022) Plynová chromatografie. In Organická Analýza, edited by Čáslavský, J. & Ševčík, J. G. K., 57-89. Czech Republic: 2 THETA. (In English Gas Chromatography. In Organic Analysis)

  • Kilaz, G., Vozka, P. (2020). Methods for classification of hydrocarbon mixtures. U.S. Patent Application, US 2020/0132640 A1

  • Gieng, H., Barzallo, G., Vozka, P. "Quantitation of Olefin Content in Plastic-Derived Pyrolysis Oils" LECO Corporation
     
  • Vozka, P.; Kilaz, G.  “Evaluation of GC Column Chemistry for a GCxGC-FID Test Method for Navy Tactical Fuels” Naval Enterprise Partnership Teaming with Universities for National Excellence Research Report to Naval Air Warfare Center Aircraft Division. May 2020
  • Vozka, P.; Kilaz, G.  “Compositional Survey of Navy Tactical Fuels – Neat Alternative Fuels, Alternative Fuel Blends, and Alternative Fuel Blend of Blends” Naval Enterprise Partnership Teaming with Universities for National Excellence Research Report to Naval Air Warfare Center Aircraft Division. May 2020
  • Vozka, P.; Kilaz, G.  “Development of an IOC (Phase 3) Advanced Analytical Test Method: A GCxGC-FID Test Method for Detection and Quantification of Nonpolar High Molecular Weight Contaminants in Navy Tactical Fuels” Naval Enterprise Partnership Teaming with Universities for National Excellence Research Report to Naval Air Warfare Center Aircraft Division. May 2020
  • Modereger, B.; Vozka, P.; Kenttämaa, H.; Kilaz, G.  “Hydrocarbon Compound Class Distribution via GCxGC-FID for All Navy Tactical Fuels: Standardization” Purdue University Research Report to Naval Air Warfare Center Aircraft Division. May 2020
  • Vozka, P.; Kilaz, G.  “Standardization (Phase 4) of the Advanced Analytical Test Method: A GCxGC-FID Test Method for the Detection and Quantification of Nonpolar High Molecular Weight Contaminants in Navy Tactical Fuels” Postdoctoral Research Report to Naval Air Warfare Center Aircraft Division. May 2020
  • Vozka, P.; Mastrean, A.; Li, A.; Qiao, L.; Kilaz, G. "Chemical Composition, Physical Properties, and Concentration Flammability Limits of Petroleum-Based and Alternative Aviation Fuels" Report to Federal Aviation Administration. July 2020.