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An Expert System for Interpreting Pyrolysis-GC/MS Data for Synthetic Paint Media
This webinar describes the use of an expert system for interpreting Pyrolysis-GC/MS data for synthetic paint media.
Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) is a reliable analytical technique capable of characterizing a wide range of organic materials, yet even reasonably experienced users can be intimidated by the challenges of data interpretation. An expert system utilizing AMDIS (Automated Mass Spectral Deconvolution and Identification System, available from NIST) for marker compound identification and Excel for data interpretation was developed at the Getty Conservation Institute that facilitates accurate characterization of synthetic paint media. The system, which incorporates knowledge from Py-GC/MS experts about marker compounds along with guidelines on how to interpret their distributions in paint samples, can benefit paint chemists and forensic examiners of trace evidence.
Key webinar takeaways:
- Learn how to use AMDIS for marker compound identification in paint samples
- Discover capabilities of Excel for sorting marker compounds in an AMDIS report into different categories of paint media
- Employ expert knowledge in the system to determine sample composition
- Use customized graphs and tables for meaningful presentation of composition results
PRESENTED BY:
Rojin Belganeh
Technical Director,
Frontier Lab Americas
Rojin Belganeh is the Technical Director at Frontier Lab Americas. Rojin graduated from the University of Houston with a Bachelor of Science in Chemistry. She started her profession as an analytical chemist at Nalco Champion-An Ecolab company in 2012. As an analytical chemist, Rojin worked with various analytical instruments, such as Pyrolysis GCMS, TGA, FTIR, and X-Rays for material characterization, polymer identification, and contamination analysis. She also holds an MBA degree concentrating in strategic marketing from the University of Houston-Victoria. As a former user for more than five years, Rojin joined Frontier Laboratories in May of 2017. She is very passionate in creating awareness about Frontier technology and providing technical support to users.
Michael Schilling, PhD
Associate Scientist,
Getty Conservation Institute
Mr. Schilling studied chemistry at California State Polytechnic University in Pomona, California. Michael Schilling assisted in authenticity studies of art objects being considered for acquisition by the Museum. Later, after the GCI was established as a separate program of the J. Paul Getty Trust, his work included performing color measurements in the tomb of Nefertari prior to the tomb’s conservation; he is now doing similar work on the Mogao and Yungang Grottoes in China. He also has conducted research on volatile organic compounds emitted from building materials used in museum display and storage. At the moment, most of his professional time is spent conducting gas chromotography and mass spectrometry of organic binding media as part of the Institute’s research on binding media, the substance that holds pigments together and that adheres paint to surfaces. Mr. Schilling continued his studies at Cal Poly, receiving a master’s degree in analytical chemistry in 1990.
Terry Ramus, PhD
Principal,
Diablo Analytical
Over the last 35 years, Dr. Terry Ramus has done research in gas phase analytical techniques with an emphasis on applications of Mass Spectrometry and GC/MS for the industrial and engineering sectors. Application areas include process measurements for Engineering experiments such as catalysis, reactor performance, yield optimization, and scale-up. Experiments include alternative energy, syngas, and pyrolysis. These experiments include hardware and software for analytical systems, including mass spectrometry, chromatography, and other spectroscopic and discrete analytical techniques. For over 20 years now, research has emphasized the characterization of process gases in Real-time with Real-time Mass Spectrometry (RTGA-MS). Other efforts are centered on Pyrolysis-GC/MS for polymer and material characterization characterization and deformulation. During these years, Dr. Ramus has worked as a Principal with Diablo Analytical, Inc. from his laboratory in California. Dr. Ramus received his Ph.D. in Analytical Chemistry from Oregon State University in 1985.
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