Event Title

A Study of Varnish & Binder Aging in Art Conservation: Development of a Solid-Phase Microextraction Gas Chromatography Method

Mentor 1

Joseph Aldstadt

Location

Union Wisconsin Room

Start Date

29-4-2016 1:30 PM

End Date

29-4-2016 3:30 PM

Description

We will describe a study that applies the analytical methods of high-resolution gas chromatography (HRGC) and solid-phase microextraction (SPME) as a means to better understand the degradation process of accelerated aged complex mixtures of paint varnish and binder. The method developed in this study can be used to better interpret materials used in art artifacts to yield more informed treatment options in the field of art conservation. This is done through the isolation and identification of the respective spectral peaks of the aged paint varnish and binder which are monitored as the material decomposition takes places as a function of variables such as temperature, humidity, and photochemical decay. These degradative factors have already been studied in an earlier research project using Raman Spectroscopy, which, however, has limitations with complex mixtures- limitations that can be addressed using the new method developed through the current study. In addition, other detectors (i.e. Mass Spectrometer (MS), Flame Ionization Detector (FID)) can be used and their methods extended for future work that includes the development and more comprehensive interpretation of potential standards. In conclusion, this study on the structures and reactions of accelerated aged varnish and binder material reveals a better understanding of the degradation process in relation to the variables involved, and more practically, is intend to be applied in art conservation for an overall better understanding of decomposed paint and varnish complex mixtures.

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Apr 29th, 1:30 PM Apr 29th, 3:30 PM

A Study of Varnish & Binder Aging in Art Conservation: Development of a Solid-Phase Microextraction Gas Chromatography Method

Union Wisconsin Room

We will describe a study that applies the analytical methods of high-resolution gas chromatography (HRGC) and solid-phase microextraction (SPME) as a means to better understand the degradation process of accelerated aged complex mixtures of paint varnish and binder. The method developed in this study can be used to better interpret materials used in art artifacts to yield more informed treatment options in the field of art conservation. This is done through the isolation and identification of the respective spectral peaks of the aged paint varnish and binder which are monitored as the material decomposition takes places as a function of variables such as temperature, humidity, and photochemical decay. These degradative factors have already been studied in an earlier research project using Raman Spectroscopy, which, however, has limitations with complex mixtures- limitations that can be addressed using the new method developed through the current study. In addition, other detectors (i.e. Mass Spectrometer (MS), Flame Ionization Detector (FID)) can be used and their methods extended for future work that includes the development and more comprehensive interpretation of potential standards. In conclusion, this study on the structures and reactions of accelerated aged varnish and binder material reveals a better understanding of the degradation process in relation to the variables involved, and more practically, is intend to be applied in art conservation for an overall better understanding of decomposed paint and varnish complex mixtures.