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DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY AND INTERNATIONAL FORENSIC RESEARCH INSTITUTE
Florida International University, University Park, Miami, Florida 33199

Staff

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Tatiana Trejos, Master of Science
in Forensic Science (Awarded 2003)

I am Coordinator of Research Programs at the International Forensic Research Institute, Department of Chemistry and Biochemistry at Florida International University. My main tasks within Dr Almirall’s group are a) to manage the Trace Evidence Analysis Facility (TEAF), b) to assist graduate and undergraduate students with their research projects, c) to help training students and forensic practitioners in the area of trace evidence and d) to assist faculty from the Chemistry Department and other Departments within FIU and outside the FIU campus in the analysis, research and development of methods for elemental analysis.

My first job as a forensic chemist was at the Forensic Science Laboratory in Costa Rica (Department de Ciencias Forenses, Organismo de Invesgación Judicial). I worked at DCF for 7 years in the areas of drugs, toxicology and trace evidence. I participated as founding member and first president of the Forensic Association: “Asociación Costarricense de Profesionales en Ciencias Forenses”. I am currently co-director of the bilingual scientific journal: Revista de Ciencias Forenses (www.accf.or.cr).

Tatiana Trejos, MSc

I joined Dr Almirall’s group at FIU in 2002 and did my master’s thesis research in the forensic analysis of glass and paint by LA-ICP-MS. I enjoy the university environment because it promotes the excellence in education, the development of technological advances and the dissemination and application of the knowledge in our community.
My expertise is in elemental analysis of materials including the forensic analysis of glass, soil, fiber and paint evidence.

Scientific Papers, Book Chapters And Other Publications

  • Almirall, JR, Trejos T. Developments in the forensic analysis of glass: a review, Rev. Cien. Foren, 2006 1,1.
  • Almirall JR, Trejos T. Advances in the Forensic Analysis of Glass Fragments: A Review with focus on refractive index and elemental analysis. Forensic Science Review, 18, 2, July 2006, 74-95 (invited contribution)
  • Smith K, Trejos T, Watling J, Almirall J. A Guide for the quantitative elemental analysis of glass using LA-ICP-MS. Atomic Spectroscopy, 27 (3), May/June 2006, p 69-75.
  • Umpierrez S, Trejos T, Neubauer K, Almirall J. Determination of Iron in Glass by Laser Ablation and Solution using a DRC-ICP-MS. Atomic Spectroscopy, 27 (3), May/June 2006, p 76-79
  • T. Trejos and J.R. Almirall. Sampling strategies for the analysis of glass fragments by LA-ICP-Ms: Part I: Microhomogeneity study of glass and its application to the interpretation of forensic evidence, Talanta, 2005, 67: 388-395
  • T. Trejos and J.R. Almirall. Sampling strategies for the analysis of glass fragments by LA-ICP-Ms: Part II: Samples size and sanmple shape considerations, Talanta, 2005, 67: 395-401
  • Latkoczy, Christopher; Becker, Stefan; Ducking, Marc; Gunther, Detlef; Hoogewerff, Jurian A.; Almirall, Jose R.; Buscaglia, JoAnn; Dobney, Andrew; Koons, Robert D.; Montero, Shirly; van der Peijl, Gerard J. Q.; Stoecklein, Wilfried R. S.; Trejos, Tatiana; Watling, John R.; Zdanowicz, Vincent S. Development and evaluation of a standard method for the quantitative determination of elements in float glass samples by LA-ICP-MS. Journal of Forensic Sciences (2005), 50(6), 1327-1341.
  • Almirall, Jose R.; Trejos, Tatiana; Hobbs, Andria; Perr, Jeannette; Furton, Kenneth G. Mass spectrometry in forensic science. In: Advances in Mass Spectrometry, AE Ashcroft, G Brenton, JJ Mohaghan (Eds), Elsevier, (2004), 16, chapter 10, 167-187.
  • Salas, M (ed); Vargas J; Trejos T, Mora M, Madrigal M.(editorial commitee) Manual de Recolección de Indicios (2004). ISNB 9968-770
  • T. Trejos. Forensic Analysis of Glass and Paints by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). Thesis, Master of Science, Florida International University (FIU), 2003
  • T Trejos, S Montero, JR Almirall. Analysis and Comparison of Glass Fragments by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and ICP-MS Journal of Analytical and Bioanalytical. Chemistry, 2003, 376, 8: 1255-1264
  • T. Trejos and J.R. Almirall, Effect of fractionation on the elemental analysis of glass using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) , Analytical Chemistry, March 2003
  • JR Almirall, T. Trejos, A. Hobbs, K. Furton. Trace elemental analysis of glass and paint samples of forensic interest by ICP-MS using Laser Ablation solid sample introduction, In Carapezza EM (Ed): Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Defense and Law Enforcement II; Proceedings of the International Society for Optical Engineering (SPIE); Vol 5071: p 193; September 2003.

Poster Presentations At Scientific Meetings

  • 8th European Workshop on Laser Ablation, Zurich, Switzerland, Forensic analysis of soils and sediments by LA-ICP-MS, L. Arroyo, T.Trejos, P. Gardinali and JR Almirall, July 2006
  • Winter Conference on Plasma Spectrochemistry, Tucson, AR. 56Fe and 57Fe limits of detection in glass by HR-ICP-MS and DRC-ICPMS, W.Castro, T. Trejos, B. Naes and JR Almirall, January 2006
  • Winter Conference on Plasma Spectrochemistry, Tucson, AR. Quantitative Determination of Elements in Forensic Float Glass Samples by LA-ICP-MS: Presentation of a standard routine method, C. Latkoczy, W Pauli, S Becker, M Ducking, D Gunther, J Hoogewerff, J Almirall, T. Trejos, J Watling, V Zdanowicz, January 2006
  • 1er Congreso en Ciencias Forenses: Costa Rica 2004. San José, Costa Rica. Impacto del método de recolección de fragmentos de pintura de vehículos en la interpretación de la evidencia: análisis de casos, M Mendez, T. Trejos, November 2004
  • 1er Congreso en Ciencias Forenses: Costa Rica 2004. San José, Costa Rica. Optimización y validación del análisis forense de acelerantes tipo hidrocarburo mediante(Fast-GC-FID) y (GC-MS) con sistemas de auto-muestreador, AL Montero, T. Trejos, November 2004
  • 56th Annual Meeting, American Association of Forensic Science. Dallas, TX. Elemental Analysis of Materials by Laser Ablation Inductively Coupled Plasma (LA- ICP-MS) for Forensic Applications; Instrumental Considerations, JR Almirall and T. Trejos, February 2004
  • 17th International Symposium on the Forensic Sciences, ANZFSS, Wellington, New Zealand, Sampling considerations in the analysis of glass fragments by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS, )T.Trejos and JR Almirall, March 2004 (Best Poster Award)
  • Winter Conference on Plasma Spectrochemistry, Fort Lauderdale, FL. Micro-homogeneity considerations for the forensic analysis of glass by laser ablation-ICP-MS. JR Almirall, T. Trejos , and J Perr, January 2004
  • 16th meeting of the International Mass Spectrometry Conference (IMSC), Edinburgh, Scotland. Study of the effects from size and distribution of particles entering a plasma and elemental fractionation on the quantification of glass samples during LA-ICP-MS. T. Trejos and JR Almirall, September 2003
  • Forensic Science Symposium, 21st century Forensic Sciences in South Florida, Miami, FL. Comparison of Solution External Calibration, Solution Isotope Dilution and Laser Ablation as Tools in the Analysis of Glass Fragments by Inductively Coupled Plasma Mass Spectrometry, T. Trejos, S. Montero and J.R. Almirall, January 18, 2003
  • 16th meeting of the International Association of Forensic Sciences IAFS, Montpellier, France. Comparison of Solution External Calibration, Solution Isotope Dilution and Laser Ablation as Tools in the Analysis of Glass Fragments by Inductively Coupled Plasma Mass Spectrometry, T. Trejos, S. Montero and J.R. Almirall, September 16-22, 2002

Oral Presentations At Scientific Meetings

  • 59th Annual Meeting, American Association of Forensic Science. San Antonio, TX. Micro-homogeneity studies of trace elements in solid matrices by LA-ICP-MS: Implications for forensic comparisons, T.Trejos, B. Naes, J.R. Almirall, February 2007
  • Encuentro de Ciencias Forenses, Ponencias de Revista de Ciencias Forenses, San José, Costa Rica, Developments in the Forensic Analysis of Glass, T Trejos and Jose Almirall, November 2006
  • 33rd Annual Meeting, Federation of Analytical chemistry and Spectroscopy Societies, FACSS, Orlando, FL, Application of Laser Ablation Inductively Coupled Plasma Mass Spectrometry to solid matrices of forensic interest, T Trejos and Jose Almirall, September 2006
  • 57th Annual Meeting, American Association of Forensic Science. New Orleans. Forensic Analysis of Paints by LA-ICP-MS, NITECRIME workshop, T. Trejos and JR Almirall, February 2005
  • 1er Congreso en Ciencias Forenses: Costa Rica 2004. San José, Costa Rica. Relevancia del análisis de vidrios como elemento de transferencia en escenas del crimen: análisis de un caso, T. Trejos and JR Almirall, November 2004
  • 1er Congreso en Ciencias Forenses: Costa Rica 2004. San José, Costa Rica. Aspectos de Etica Forense, T. Trejos, November 2004
  • 56th Annual Meeting, American Association of Forensic Science (AAFS), Dallas, TX. Sampling considerations in the analysis of glass fragments by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS), T. Trejos and JR Almirall, February 2004
  • 30th Annual Meeting FACSS, Federation of Analytical chemistry and Spectroscopy Societies Fourt Lauderdale, FL Application of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) to the Fingerprinting” of Trace Evidence, T. Trejos and JR Almirall. October 19 - 23, 2003
  • FAME Florida American Chemical Society, Florida Section. Orlando, FL. Evaluation of the Homogeneity of Glass Samples by LA-ICP-MS. T. Trejos and JR Almirall, 8-10 May 2003
  • NITECRIME group meeting , Viena, Austria, Forensic Analysis of Paints by LA-ICP-MS, T. Trejos, A. Hobbs and JR Almirall, April 28-30 2003
  • 55th Annual Meeting of the American Academy of Forensic Sciences, Chicago, IL. Evaluation of Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS) as a Tool for the Elemental Analysis and Discrimination of Glass Evidence. T. Trejos and JR. Almirall , February 17-22 2003
  • 55th Annual Meeting of the American Academy of Forensic Sciences, Chicago, IL. Use of a Database of Elemental and Refractive Index Values from Glass Samples to Determine the Significance of Matching Profiles in a Comparison Between Glasses. JR Almirall,. T. Trejos , A Hobbs and Shirly Montero , February 17-22 2003
  • VII ENFSI Paint and Glass WG Meeting, Madrid, Spain. Elemental Analysis of Glass and Paint by ICP-MS, ID-ICP-MS and LA-ICP-MS, T. Trejos, S Montero, A. Hobbs and J.R. Almirall, September 18-20 2002
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