Figure 3
GC-MS analysis of Tianluoshan pottery. (A) Partial total ion chromatogram of a TLE from typical foodcrust associate with the Tianluoshan pottery vessels (TLS1016F) obtained by GC-MS using a DB1-HT column. Cx:y refers to fatty acids with x carbon atoms and y unsaturations. Filled squares are isomers of ω-(o-alkylphenyl)octadecanoic acid that partially co-elute with C18:0 and C18:1 fatty acids. Open circles are TMS derivatives of furanose and pyranoses sugars. (B) Mass chromatogram (m/z 290) showing isomeric distribution of C18 APAAs extracted with acidified methanol from a typical foodcrust (TLS035F) and resolved on a DB-23 column in SIM mode. (C) Partial total ion chromatogram of TLE from the Tianluoshan pottery foodcrust (TLS1015F) showing the existence of beeswax38. Asterisk - odd number alkanes with carbon chain length indicated; filled circles = alkanols with carbon chain length indicated. Cx:y means saturated fatty acids with x carbon length and number of unsaturations y. IS: internal standard (n-hexatriacontane).
