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Non-proximate Sampling and Photoionization for Damage-Free Mass Spectrometric Analysis of Intact Native American
G Asher Newsome1, Kathleen M Martin2
1Smithsonian Museum Conservation Institute, Suitland, Maryland 20746, United States.
Analytical Chemistry
|June 30, 2023
Summary
This study identifies dyes in Native American woodsplint baskets using ambient mass spectrometry. The non-invasive technique preserves cultural artifacts while revealing traditional coloration methods.
Area of Science:
- Materials Science
- Analytical Chemistry
- Cultural Heritage Preservation
Background:
- Native American woven woodsplint basketry represents a significant cultural heritage.
- Traditional manufacturing techniques, including dyeing processes, are not fully understood.
- Previous methods for dye analysis may be invasive or unsuitable for delicate artifacts.
Purpose of the Study:
- To identify dyes and colorants used in Native American woodsplint baskets (1870-1983).
- To develop and validate a minimally invasive analytical method for cultural heritage objects.
- To recover traditional knowledge related to basketry coloration.
Main Methods:
- Development of an ambient mass spectrometry system for non-destructive sampling.
- Utilizing a nitrogen jet to thermally desorb neutral material from intact basket surfaces.
- In-line doping with anisole and photoionization for real-time dye molecule identification.
- Optimization and testing on dyed wood splints to ensure no surface damage.
Main Results:
- Successful identification of dye molecules in selected Native American baskets.
- Demonstration of the ambient mass spectrometry system's capability for in-situ analysis.
- Confirmation that the method causes no visible discoloration or damage to the basket materials.
- Data obtained provides insights into historical dyeing practices.
Conclusions:
- Ambient mass spectrometry is a viable and effective technique for analyzing dyes in cultural heritage woodsplint baskets.
- The developed method allows for the recovery of traditional knowledge without compromising artifact integrity.
- This approach offers a new avenue for the study and preservation of indigenous craft traditions.
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