Abietic acid chromatogram

Figure 8.4 Total ion current chromatograms of the (a) acidic and (b)neutral fractions of a sample collected from an amphora recovered in Fayum. DDA, didehydroabietic acid DA, dehydroabietic acid 70DA, 7 oxo dehydroabietic acid 70A, 7 oxo abietic acid 15Hy70DA, 15 hydroxy 7 oxo dehydroabietic acid 5HyDA, 15 hydroxy dehydroabietic acid R, retene MDA, methyl dehydroabietate. Slf internal standard, hexadecane IS2, internal standard, tridecanoic acid...

To further complicate the picture, chemical additives are often not pure compounds but mixtures of related structures. The name or chemical designation of the additive often represents only the primary or most abundant chemical structure present. For example. Fig. 1 shows a chromatogram from the analysis by gas chromatography/mass spectrometry (GC/MS) of Abietic Acid, which is an organic chemical filler used in certain types of rubber. The molecular structure of Abietic Acid (I) is ... 

Fig. 1 Total ion chromatogram (TIC) from the GC/MS analysis of commercial Abietic Acid dissolved in an organic solvent. Abietic Acid is an organic filler material used in the compounding of certain types of rubber. The chromatogram clearly shows that this organic additive contains many individual chemical entities.

Figure 7.1 Total ion current (TIC) chromatogram obtained by GC-MS analysis of a resin (Pinus sylvestris). The diterpenoid resin acids were methylated (using diazomethane) to improve chromatographic performance. Peak identities 1, Methyl pimarate 2, Methyl sandaracopimarate 3, Methyl isopimarate 4, Methyl palustrate 5, Methyl dehydroabietate 6, Methyl abietate 7, Methyl neoabietate. For GC-MS operating conditions, see Heron and Pollard (1988).

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