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- W2504910556 abstract "Parallel analyses by IR, thin-layer chromatography (TLC), and gas chromatography-mass spectrometry (GC-MS) of organic remains adhering to shards of ancient amphoras excavated in the harbor of Carthage (Tunisia) identified these remains as pine pitches. Capillary GC of methylated acid fractions showed abietic acid, dehydroabietic acid, and 7-ketodehydroabietic acid as the principal components. Two-dimensional TLC of untreated ether extracts revealed abietic acid in 12 of 31 samples and dehydroabietic acid in 26 of 31 samples. IR spectra of solid, raw samples indicated the presence of isopropyl groups, characteristic of the abietane skeleton, in 80% of the samples. Rapid and convenient analysis by TLC and IR was, in most cases, sufficient to identify pine resin products even after extensive pyrolytic and oxidative degradation." @default.
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- W2504910556 date "1989-07-01" @default.
- W2504910556 modified "2023-10-11" @default.
- W2504910556 title "Residues and Linings in Ancient Mediterranean Transport Amphoras" @default.
- W2504910556 doi "https://doi.org/10.1021/ba-1988-0220.ch020" @default.
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