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. However, even 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 Pyrolysis-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