Abstract
One piece from Mumujyana ruins and one piece from Urasoe Yōdore (a mausoleum), both belong to Ryukyu Kingdom, were analyzed by direct and derivative pyrolysis gas chromatograph/mass spectrometry (Py-GC/MS). Direct Py-GC/MS chromatogram at m/z=108 of both samples showed that peaks of 3-pentadecylphenol and 3-heptadecylphenol were relatively weak, and the shape of peaks from low molecular weight component group formed a platform, different from the mountain type of the three standard Toxicodendron vernicifluum, Toxicodendron succedanea, and Gluta usitata lacquers. However, analysis of a mixture of the three kind lacquers and a sample of T. succedanea mixed with T. vernicifluum showed a similar platform shape on chromatogram at m/z=108. In addition, in order to confirm this result, derivative Py-GC/MS was also performed, and the results are compared and discussed.
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