Stratigraphic Examination of a Korean Lacquered Wooden Coffin Sample by Pyrolysis/GC/MS was written by Park, Jongseo;Schilling, Michael R.;Khanjian, Herant;Lee, Jiyoung. And the article was included in Chromatographia in 2018.Formula: C12H22O4 This article mentions the following:
A lacquered wooden coffin decorated with gilded Sanskrit letters excavated in the Nongso ancient tomb site was constructed around the fourteenth century in Korea. Pyrolysis/gas chromatog./mass spectrometry was employed to identify the materials of the lacquered surface by analyzing the individual layers. The components of lacquer were detected in all four layers of wood substrate, black, brown, and gilded layers, indicating the coating material was Asian lacquer. The wood seems to be a kind of pine tree from the observation that pine resin-related components were detected in much of the wood substrate and decreasing in the upward direction. Markers of drying oil like azelaic acid and palmitic acid existed in large quantities in the black, brown, and gilded layers, indicating that drying oil was intentionally added to give a luster. In addition, compared with dried Asian lacquer from Korea, the lacquer used in the coffin was determined to be of the same type. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Formula: C12H22O4).
Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Formula: C12H22O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics