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Tetsuo Miyakoshi - One of the best experts on this subject based on the ideXlab platform.
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materials and provenance determination of lacquerware from the ryukyu kingdom period by Pyrolysis Gas chromatography mass spectrometry and 87sr 86sr isotope ratio
Journal of Archaeological Science: Reports, 2019Co-Authors: Rika Nakagawa, Shun'ichi Nakai, Tetsuo Miyakoshi, Takayuki HondaAbstract:Abstract Three wood chips found in a wooden coffin discovered in the Mumujyana graves of the Ryukyu Kingdom period were analyzed by Pyrolysis-Gas chromatography/mass spectrometry (Py-GC/MS), and the 87Sr/86Sr isotope ratio of one piece was measured by multi-collector inductively coupled plasma mass spectrometry to determine the materials used to produce the lacquerware and their provenance. Results from the derivative Py-GC/MS indicate that the lacquer was produced from sap of both Toxicodendron vernicifluum, which grows in eastern Asia, and Toxicodendron succedaneum, which grows in southeastern Asia. The 87Sr/86Sr isotope ratios of the film layer and wooden base of one large chip, which is considered to be a stripped piece of the wooden coffin, were
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identification of ryukyu lacquerwares by Pyrolysis Gas chromatography mass spectrometry and 87sr 86sr isotope ratio
Journal of Analytical and Applied Pyrolysis, 2016Co-Authors: Takayuki Honda, Yoshimi Kamiya, Shun'ichi Nakai, Tetsuo MiyakoshiAbstract:Abstract Six pieces of lacquer obtained from Ryukyu lacquerwares produced in the 17–19th century in the Ryukyu Kingdom were analyzed by Pyrolysis Gas chromatography/mass spectrometry and 87Sr/86Sr isotope ratio measurements to determine the identity of the lacquer source. The results were compared with the standard of natural lacquer film to discriminate lacquer species. Four pieces were made used lacquer sap collected from Toxicodendron vernicifluum lacquer tree, and other two pieces were made with lacquer sap tapped from Toxicodendron succedanea lacquer tree according to the characteristics of the Pyrolysis products. All 87Sr/86Sr isotope values of urushiol lacquerwares are over 0.71, suggesting that the origin of lacquer trees were the Asian continent.
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investigation of ryukyu lacquerwares by Pyrolysis Gas chromatography mass spectrometry
Journal of Analytical and Applied Pyrolysis, 2015Co-Authors: Takayuki Honda, Kunio Yoshida, Midori Yamabuki, Daisuke Ando, Masako Miyazato, Tetsuo MiyakoshiAbstract:Abstract Two pieces of lacquer obtained from Ryukyu lacquerwares produced in the 17–19th century in the Ryukyu Kingdom belonging to the Urasoe Art Museum were analyzed by Pyrolysis-Gas chromatography/mass spectrometry (Py-GC/MS). The results were compared with the standard of natural lacquer film to determine the identity of the lacquer species. Urushiol (MW = 320), 3-heptylcatechol (MW = 208), and 3-heptylphenol (MW = 192) were detected as Pyrolysis products of lacquer pieces of a lacquer tray made by the hakue technique, suggesting that this Ryukyu lacquerware was coated with lacquer sap tapped from a Toxicodendron vernicifluum lacquer tree. On the other hand, urushiol (MW = 320), 3-heptylcatechol (MW = 208), 3-heptylphenol (MW = 192), laccol (MW = 348), 3-nonylcatechol (MW = 236), and 3-nonylphenol (MW = 220) were detected as Pyrolysis products of lacquer pieces from a dinner tray made by the mitsuda-e technique, suggesting that this Ryukyu lacquerware was coated with mixture lacquer sap tapped from T. vernicifluum and Toxicodendron succedanea lacquer trees, respectively. Moreover, microscopy and cross-section studies demonstrated that the lacquers had a multi-layer structure. X-ray analytical microscopy was carried out directly on the surface of lacquerwares to determine the presence of different pigments.
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application of Pyrolysis Gas chromatography mass spectrometry in lacquer research a review
Polymers, 2014Co-Authors: Tetsuo MiyakoshiAbstract:Examination of thermal degradation of natural and synthetic lacquer films by Pyrolysis-Gas chromatography with mass spectrometry (Py-GC/MS) is reviewed. Due to the instantaneous heating decomposition, side reactions of internal or intermediate samples hardly occur, and the Pyrolysis products can be retrieved without any change. Py-GC/MS has been used to analyze the composition of insoluble polymers and investigate degradation of resin materials. Lacquer film is a cross-linked polymer that is insoluble in any solvent. The aim of this review is to describe the application of Py-GC/MS to the analysis of lacquer, including natural lacquer saps, synthetic lacquer derivatives, and their films. After analyzing the chemical structures of the specific Pyrolysis products by mass spectrometry, the lacquer tree species and growing region can be determined. These results have great significance for the protection and restoration of lacquer-coated cultural treasures.
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analysis of japanese jōmon lacquer ware by Pyrolysis Gas chromatography mass spectrometry
Journal of Analytical and Applied Pyrolysis, 2013Co-Authors: Takayuki Honda, Yoshimi Kamiya, Kunio Yoshida, Tetsuo MiyakoshiAbstract:Japanese Jōmon period lacquer-ware objects were analyzed using a digital optical microscope and Pyrolysis Gas chromatography–mass spectrometry. Comparison with standard lacquer films showed that all the objects were coated with sap tapped from Rhus vernicifera lacquer trees. Red iron oxide was used as a red pigment. Natural resin found in the lacquer pieces suggested that during the development of Japanese Jōmon lacquer-ware, lacquer workers used local lacquer resources to produce lacquer, and learned to use natural resin in the restoration and protection of the lacquer-ware objects. In addition, the production and technology of Jōmon lacquer-ware are also discussed.
Takayuki Honda - One of the best experts on this subject based on the ideXlab platform.
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materials and provenance determination of lacquerware from the ryukyu kingdom period by Pyrolysis Gas chromatography mass spectrometry and 87sr 86sr isotope ratio
Journal of Archaeological Science: Reports, 2019Co-Authors: Rika Nakagawa, Shun'ichi Nakai, Tetsuo Miyakoshi, Takayuki HondaAbstract:Abstract Three wood chips found in a wooden coffin discovered in the Mumujyana graves of the Ryukyu Kingdom period were analyzed by Pyrolysis-Gas chromatography/mass spectrometry (Py-GC/MS), and the 87Sr/86Sr isotope ratio of one piece was measured by multi-collector inductively coupled plasma mass spectrometry to determine the materials used to produce the lacquerware and their provenance. Results from the derivative Py-GC/MS indicate that the lacquer was produced from sap of both Toxicodendron vernicifluum, which grows in eastern Asia, and Toxicodendron succedaneum, which grows in southeastern Asia. The 87Sr/86Sr isotope ratios of the film layer and wooden base of one large chip, which is considered to be a stripped piece of the wooden coffin, were
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identification of ryukyu lacquerwares by Pyrolysis Gas chromatography mass spectrometry and 87sr 86sr isotope ratio
Journal of Analytical and Applied Pyrolysis, 2016Co-Authors: Takayuki Honda, Yoshimi Kamiya, Shun'ichi Nakai, Tetsuo MiyakoshiAbstract:Abstract Six pieces of lacquer obtained from Ryukyu lacquerwares produced in the 17–19th century in the Ryukyu Kingdom were analyzed by Pyrolysis Gas chromatography/mass spectrometry and 87Sr/86Sr isotope ratio measurements to determine the identity of the lacquer source. The results were compared with the standard of natural lacquer film to discriminate lacquer species. Four pieces were made used lacquer sap collected from Toxicodendron vernicifluum lacquer tree, and other two pieces were made with lacquer sap tapped from Toxicodendron succedanea lacquer tree according to the characteristics of the Pyrolysis products. All 87Sr/86Sr isotope values of urushiol lacquerwares are over 0.71, suggesting that the origin of lacquer trees were the Asian continent.
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investigation of ryukyu lacquerwares by Pyrolysis Gas chromatography mass spectrometry
Journal of Analytical and Applied Pyrolysis, 2015Co-Authors: Takayuki Honda, Kunio Yoshida, Midori Yamabuki, Daisuke Ando, Masako Miyazato, Tetsuo MiyakoshiAbstract:Abstract Two pieces of lacquer obtained from Ryukyu lacquerwares produced in the 17–19th century in the Ryukyu Kingdom belonging to the Urasoe Art Museum were analyzed by Pyrolysis-Gas chromatography/mass spectrometry (Py-GC/MS). The results were compared with the standard of natural lacquer film to determine the identity of the lacquer species. Urushiol (MW = 320), 3-heptylcatechol (MW = 208), and 3-heptylphenol (MW = 192) were detected as Pyrolysis products of lacquer pieces of a lacquer tray made by the hakue technique, suggesting that this Ryukyu lacquerware was coated with lacquer sap tapped from a Toxicodendron vernicifluum lacquer tree. On the other hand, urushiol (MW = 320), 3-heptylcatechol (MW = 208), 3-heptylphenol (MW = 192), laccol (MW = 348), 3-nonylcatechol (MW = 236), and 3-nonylphenol (MW = 220) were detected as Pyrolysis products of lacquer pieces from a dinner tray made by the mitsuda-e technique, suggesting that this Ryukyu lacquerware was coated with mixture lacquer sap tapped from T. vernicifluum and Toxicodendron succedanea lacquer trees, respectively. Moreover, microscopy and cross-section studies demonstrated that the lacquers had a multi-layer structure. X-ray analytical microscopy was carried out directly on the surface of lacquerwares to determine the presence of different pigments.
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analysis of japanese jōmon lacquer ware by Pyrolysis Gas chromatography mass spectrometry
Journal of Analytical and Applied Pyrolysis, 2013Co-Authors: Takayuki Honda, Yoshimi Kamiya, Kunio Yoshida, Tetsuo MiyakoshiAbstract:Japanese Jōmon period lacquer-ware objects were analyzed using a digital optical microscope and Pyrolysis Gas chromatography–mass spectrometry. Comparison with standard lacquer films showed that all the objects were coated with sap tapped from Rhus vernicifera lacquer trees. Red iron oxide was used as a red pigment. Natural resin found in the lacquer pieces suggested that during the development of Japanese Jōmon lacquer-ware, lacquer workers used local lacquer resources to produce lacquer, and learned to use natural resin in the restoration and protection of the lacquer-ware objects. In addition, the production and technology of Jōmon lacquer-ware are also discussed.
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applied analysis and identification of ancient lacquer based on Pyrolysis Gas chromatography mass spectrometry
Journal of Applied Polymer Science, 2010Co-Authors: Takayuki Honda, Yoshimi Kamiya, Nobuhiko Kitano, Tetsuo MiyakoshiAbstract:Three lacquer samples taken from a “four-eared” pottery container, which was designated an important National Cultural Property of Japan excavated in 16–17th century ruins of Kyoto City, were analyzed by Pyrolysis-Gas chromatography/mass spectrometry (Py-GC/MS) and infrared (IR) spectroscopy to determine the source of the lacquer. It is an unexpected result that the lacquer in this pottery container is actually used by Melanorrhoea usitata. Alkylbenzene and alkenylbenzene as cleavage pieces of undecylbenzene (MW = 232 g/mol) and undecenylbenzene (MW = 230 g/mol), which are products of the Pyrolysis of thitsiol, were detected in all three samples. Moreover, ω-phenylalkylcatechols and ω-phenylalkylphenols, which are the specific components of M. usitata, were also detected by Py-GC/MS, suggesting that lacquer sap of M. usitata was used by the Japanese people in the 16–17th centuries. In addition, Japanese lacquer culture and the advantages of the Py-GC/MS method for lacquer analysis are discussed in detail. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
K P Doolan - One of the best experts on this subject based on the ideXlab platform.
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a comparison of Pyrolysis Gas chromatography mass spectrometry and fourier transform infrared spectroscopy for the characterisation of automative paint samples
Analytica Chimica Acta, 2005Co-Authors: Thorburn D Burns, K P DoolanAbstract:Abstract It has been shown that by using Pyrolysis–Gas chromatography–mass spectrometry (Py-GC-MS), it is possible to discriminate between a variety of base coat, solid paint and clear coat samples of automotive paints in commercial use from a wide range of car manufacturers. Some of the solid paints and clear coats were pairs of samples indistinguishable by fourier transform infrared spectroscopy (FT-IR).
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the discrimination of automotive clear coat paints indistinguishable by fourier transform infrared spectroscopy via Pyrolysis Gas chromatography mass spectrometry
Analytica Chimica Acta, 2005Co-Authors: Thorburn D Burns, K P DoolanAbstract:Abstract It has been shown that by using Pyrolysis–Gas chromatography–mass spectrometry (Py–GC–MS), it is possible to discriminate between a variety of automotive clear coat paints, indistinguishable by Fourier transform infrared spectroscopy (FT-IR).
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a comparison of Pyrolysis Gas chromatography mass spectrometry and fourier transform infrared spectroscopy for the analysis of a series of modified alkyd paint resins
Analytica Chimica Acta, 2000Co-Authors: Thorburn D Burns, K P DoolanAbstract:It has been shown that by using Pyrolysis Gas chromatography/mass spectrometry it is possible to discriminate between members within a series of modified alkyd resins which were indistinguishable by Fourier transform infrared spectroscopy.
Johnathan A Hiltz - One of the best experts on this subject based on the ideXlab platform.
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analytical Pyrolysis Gas chromatography mass spectrometry py gc ms of poly ether urethane s poly ether urea s and poly ether urethane urea s
Journal of Analytical and Applied Pyrolysis, 2015Co-Authors: Johnathan A HiltzAbstract:Abstract The results of a Pyrolysis-Gas chromatography/mass spectrometry (py-GC/MS) study of several poly(ether urethane), poly(urea), and poly(ether urethane-urea) materials are reported. Mechanisms for the formation of pyrolytic degradation products are proposed. These can be used to differentiate between poly(ether urethane)s, poly(urea)s, and poly(ether urethane-urea)s, as well as between different poly(ether urethane)s, different poly(urea)s or different poly(ether urethane-urea)s. In conjunction with Fourier transform infrared (FT-IR) spectroscopy and thermal analysis techniques such as differential scanning calorimetry (DSC) and thermogravimetric analysis, py-GC/MS provides information that allows the characterization and identification of these polymers.
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characterization of fluoroelastomers by various analytical techniques including Pyrolysis Gas chromatography mass spectrometry
Journal of Analytical and Applied Pyrolysis, 2014Co-Authors: Johnathan A HiltzAbstract:Abstract Fluorocarbon elastomers are specified for a number of applications where excellent high temperature and chemical resistance is required. To ensure that a fluoroelastomer with the required properties for a particular application is used, characterization techniques that allow the positive identification of the elastomer are required. In this paper the characterization of four fluoroelastomer formulations – a vinylidene fluoride/hexafluoropropene (VDF/HFP) dipolymer, a vinylidene fluoride/hexafluoropropene/tetrafluoroethylene terpolymer, and two vinylidene fluoride/perfluoro(methyl vinyl ether)/tetrafluoroethylene (VDF/PMVE/TFE) tetrarpolymers – is described. The characterization techniques included Pyrolysis Gas chromatography/mass spectrometry (py-GC/MS), Fourier transform infrared (FT-IR) spectrometry, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Py-GC/MS was the only characterization technique that could identify the four formulations unambiguously. The positive identification was based on differences in the pyrolytic degradation products of the flouroelastomer formulations.
Thorburn D Burns - One of the best experts on this subject based on the ideXlab platform.
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a comparison of Pyrolysis Gas chromatography mass spectrometry and fourier transform infrared spectroscopy for the characterisation of automative paint samples
Analytica Chimica Acta, 2005Co-Authors: Thorburn D Burns, K P DoolanAbstract:Abstract It has been shown that by using Pyrolysis–Gas chromatography–mass spectrometry (Py-GC-MS), it is possible to discriminate between a variety of base coat, solid paint and clear coat samples of automotive paints in commercial use from a wide range of car manufacturers. Some of the solid paints and clear coats were pairs of samples indistinguishable by fourier transform infrared spectroscopy (FT-IR).
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the discrimination of automotive clear coat paints indistinguishable by fourier transform infrared spectroscopy via Pyrolysis Gas chromatography mass spectrometry
Analytica Chimica Acta, 2005Co-Authors: Thorburn D Burns, K P DoolanAbstract:Abstract It has been shown that by using Pyrolysis–Gas chromatography–mass spectrometry (Py–GC–MS), it is possible to discriminate between a variety of automotive clear coat paints, indistinguishable by Fourier transform infrared spectroscopy (FT-IR).
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a comparison of Pyrolysis Gas chromatography mass spectrometry and fourier transform infrared spectroscopy for the analysis of a series of modified alkyd paint resins
Analytica Chimica Acta, 2000Co-Authors: Thorburn D Burns, K P DoolanAbstract:It has been shown that by using Pyrolysis Gas chromatography/mass spectrometry it is possible to discriminate between members within a series of modified alkyd resins which were indistinguishable by Fourier transform infrared spectroscopy.
