Chemical Profile of the Organic Residue from Ancient Amphora Found in the Adriatic Sea Determined by Direct GC and GC-MS AnalysisReport as inadecuate




Chemical Profile of the Organic Residue from Ancient Amphora Found in the Adriatic Sea Determined by Direct GC and GC-MS Analysis - Download this document for free, or read online. Document in PDF available to download.

1

Faculty of Chemistry and Technology, University of Split, N. Tesle 10-V, 21000 Split, Croatia

2

University of Applied Sciences Marko Marulić in Knin, P. Krešimira IV 30, 22300 Knin, Croatia

3

Department of Organic Chemistry, Laboratory for Stereoselective Catalysis and Biocatalysis, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia





*

Author to whom correspondence should be addressed.



Abstract An ancient organic residue was collected from the bottom of a Greco-Italian amphora found in the Adriatic Sea and investigated by direct GC and GC-MS analysis. The headspace composition was determined by HS-SPME using: 1 DVB-CAR-PDMS and 2 PDMS-DVB fibres. Higher percentages of benzene derivatives, monoterpenes and other low-molecular aliphatic compounds were obtained by method 1 in contrast to higher percentage of naphthalene and phenanthrene derivatives found by method 2. In comparison with the composition of pine resin, it is more likely that the found low-molecular aliphatic alcohols, acids, esters and carbonyls with 2-phenylethanol were trapped and preserved within the organic residue from stored wine – the amphora’s originally content. Semi-volatile diterpenes methyl dehydroabietate 33.6% and retene 24.1% were dominant in the residue CH2Cl2 solution. Other abundant compounds were 1,4-dimethoxyphenanthrene 6.8% as well as other naphthalene and-or phenanthrene derivatives 7-1-methylethyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydronaphthalene, 7-1-methylethyl-1,4a-dimethyl-2,3,4,4a,9,10-hexahydrophenanthrene, 7-1-methylethyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydro-phenanthrene, 3,6-dimethylphenanthrene and 2,3,5-trimethylphenanthrene. Possible sources and formation pathways of the major compounds in the residue were discussed.

Keywords: amphora organic residue; HS-SPME; GC-MS; methyl dehydroabietate; retene amphora organic residue; HS-SPME; GC-MS; methyl dehydroabietate; retene





Author: Igor Jerković 1,* , Zvonimir Marijanović 2, Mirko Gugić 2 and Marin Roje 3

Source: http://mdpi.com/



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