Validation Study of Selected Ion Flow Tube-Mass Spectrometry (SIFT-MS) in Heritage Science: Characterization of Natural and Synthetic Paint Varnishes by Portable Mass Spectrometry

The identification at molecular level of organic materials in heritage objects as paintings requires in most cases the collection of micro-samples followed by micro-destructive analysis. In this study, we explore the possibility to characterize natural and synthetic resins used as paint varnishes by...

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Bibliographic Details
Published in:Journal of the American Society for Mass Spectrometry 2019-11, Vol.30 (11), p.2250-2258
Main Authors: La Nasa, Jacopo, Modugno, Francesca, Colombini, Maria Perla, Degano, Ilaria
Format: Article
Language:English
Subjects:
Analytical Chemistry
Bioinformatics
Biotechnology
Chemistry
Chemistry and Materials Science
Gas chromatography
Ionization
Ions
Mass spectrometry
Nondestructive testing
Organic Chemistry
Organic materials
Polymers
Polyvinyl acetates
Portability
Proteomics
Qualitative analysis
Research Article
Scientific imaging
Solid phases
Spectroscopy
Synthetic resins
Varnishes
VOCs
Volatile organic compounds
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Summary:The identification at molecular level of organic materials in heritage objects as paintings requires in most cases the collection of micro-samples followed by micro-destructive analysis. In this study, we explore the possibility to characterize natural and synthetic resins used as paint varnishes by mean of non-invasive analysis of released volatile organic compounds (VOCs) through selected ion flow tube-mass spectrometry (SIFT-MS). SIFT-MS is a portable direct mass spectrometric technique that achieves the analysis of VOCs at trace levels in real time, by controlled ultra-soft chemical ionization using eight different chemical ionization agents. We tested the portable instrumentation on different reference resins used as paint varnishes, both natural (mastic, dammar, and colophony) and synthetic (Paraloid B67, MS2A, Regalrez 1094, and polyvinyl acetate), to evaluate the possibility to acquire qualitative data for the identification of these materials in heritage objects avoiding any sampling. This new analytical approach was validated by comparison with the traditional approach for VOCs analysis based on solid phase micro extraction-gas chromatography/mass spectrometry (SPME-GC/MS) analysis. The results demonstrate the use of SIFT-MS as an in situ non-invasive and non-destructive mass spectrometric technique to identify organic materials, such as paint varnishes.
ISSN:1044-0305
1879-1123
DOI:10.1007/s13361-019-02305-4