Volatile organic compounds from wood and their influences on museum artifact materials II: Inference of causal substances of deterioration based on intercomparison of laser Raman spectra of deteriorated products |
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| Authors: | Tadashi Oikawa Toshiya Matsui Yasunori Matsuda Teruko Takayama Hitoshi Niinuma Yasuyo Nishida Kazuo Hoshi Mitsuyoshi Yatagai |
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| Institution: | (1) Tohoku History Museum, 1-22-1 Takasaki, Tagajo 985-0862, Japan;(2) World Heritage Studies Program, Master’s Program in Design, University of Tsukuba, Tsukuba 305-8574, Japan;(3) Tohoku University of Art and Design, Institute of Conservation of Cultural Property, Yamagata 990-9530, Japan;(4) Yuki Works, Nippon Muki Co. Ltd., Ibaraki 307-0046, Japan;(5) Sendai Technology Center, Sony Corporation, Miyagi 985-0842, Japan;(6) Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan |
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| Abstract: | Volatile organic compounds (VOCs) from wood and their effects on artifacts are of intense interest to museum staff who must
strictly manage the preservation environment. In this study, the causal substances of deterioration were inferred by comparison
with laser Raman (LR) spectra of deterioration products. The artifact samples were deteriorated using VOCs from woods (WV
test), and using specific substances that occur in wood VOCs (SV test). The deteriorated samples were analyzed by LR spectroscopy
and the results of the WV and SV tests were compared.
Hinokitiol and acetic acid were found to be two of the main causal substances of deterioration in western red cedar. Deterioration
of iron and copper by spruce did not appear to be caused by acetic acid, as is generally assumed, but by some other unknown
compound(s). Sensitivity to wood-based VOC components depended on the type of artifact. In western red cedar, mitsudasou (litharge) was very sensitive to acetic acid, while other artifacts were sensitive to hinokitiol. The LR method used in this
study is very useful for the inference of causal substances of deterioration based on the detection of small amounts of deteriorated
products such as those generated by deterioration due to wood VOCs.
Part of this article was presented at the 25th Annual Meeting of the Japan Society for the Conservation of Cultural Property,
Kyoto, June 2003 |
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| Keywords: | Museum artifact material Discoloration Laser Raman spectroscopy Volatile organic compounds Hinokitiol |
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