Utility of a System Consisting of EGA/PY-3030D and GCMS-QP2010 Ultra − Analysis of Eyeliner and Pyrolysis of a Mural Paint at 1000°C −

Importance of the Topic

Evolved gas analysis coupled with pyrolysis-GC/MS enables rapid, comprehensive profiling of complex materials without sample pre-treatment. This approach is vital for industries such as cosmetics, coatings and cultural heritage conservation, where detailed compositional insights support quality control, authentication and preservation.

Objectives and Study Overview

This study evaluates the performance of an EGA/PY-3030D micro-furnace pyrolyzer integrated with a Shimadzu GCMS-QP2010 Ultra. Two applications are illustrated:

• Characterization of a commercial eyeliner covering volatile solvents, additives and polymeric components.
• High-temperature pyrolysis of an ancient mural paint fragment up to 1 000 °C to identify organic and inorganic constituents.

Methodology and Instrumentation

Temperature-programmed EGA-MS (40 °C to 600/1 000 °C at 20 °C/min) is performed via a deactivated capillary directly into the MS for real-time thermograms. Heart-cut EGA-GC/MS selectively transfers defined thermal zones to a chromatographic column for detailed separation and mass spectral identification.

Instrumental Setup

• Pyrolyzer: Frontier Laboratories EGA/PY-3030D multi-shot micro-furnace
• GC/MS: Shimadzu GCMS-QP2010 Ultra with split/splitless injector
• Columns: 2.5 m×0.15 mm EGA tube; 30 m×0.25 mm Ultra ALLOY-5 capillary column
• Cryo-trap: MicroJet MJT-1030Ex for low-boiling compounds
• Carrier gas: Helium; MS scan range m/z 29–600

Key Findings and Discussion

• Eyeliner EGA thermogram displayed five thermal zones (A–E): zones A–C (40–310 °C) comprised solvents and additives; zones D–E (310–500 °C) yielded polymer pyrolyzates such as methyl methacrylate and cyclic dimethylsiloxanes.
• Heart-cut GC/MS enabled unambiguous identification of 1,3-butanediol, phenoxyethanol, methyl and propyl parabens, PMMA monomers and PDMS fragments.
• Mural paint EGA up to 1 000 °C revealed natural wax hydrocarbons (<600 °C), CO₂ from carbonates (600–800 °C) and sulfur compounds from sulfates (850–1 000 °C), confirmed by SEM-EDX elemental analysis.

Benefits and Practical Applications

• Streamlined compositional profiling of diverse products in cosmetics, paints, coatings and polymer research.
• Non-destructive diagnostic tool for art conservation and forensic investigations.
• Wide temperature range facilitates simultaneous organic and inorganic analysis.

Future Trends and Opportunities

Integration with high-resolution mass analyzers, automated thermal zone selection, enhanced cryo-trapping methods and application to emerging materials (nanocomposites, biopolymers) will expand the technique’s capabilities and adoption in research and industry.

Conclusion

The EGA/PY-3030D in combination with the GCMS-QP2010 Ultra provides a versatile, reliable platform for thermal-zone resolved analysis. Demonstrated on both cosmetic and archaeological samples, it offers broad utility for quality control, materials characterization and conservation science.

References

• Tsuge S., Ohtani H., Watanabe C.: Pyrolysis-GC-MS Data Book of Synthetic Polymers, Elsevier, 2011.
• Tsuge S. et al.: EGA-GC/MS for Polymer Characterization, American Laboratory 35(1), 2003.
• Tsuge S. et al.: Advances in EGA-GC/MS Part 2, American Laboratory 35(3), 2003.
• Tsuge S. et al.: Thermal Analysis of Polymers Part 3, American Laboratory 35(12), 2003.
• Tsuge S. et al.: Evolved Gas Analysis Techniques, American Laboratory 36(2), 2004.
• Frontier Laboratories Ltd. Technical Notes PYT-004E, PYT-007E, PYA1-012E, PYA1-032E.
• Watanabe C. et al.: Application of Heart-Cut EGA-GC/MS, LCGC 20(4), 2002.
• Watanabe C. et al.: Vent-Free GC/MS Interface for EGA, Analytical Sciences 27, 2011.