Occurrence and Sources of Triterpenoid Methyl Ethers and Acetates in Sediments of the Cross-River System, Southeast Nigeria

Figure 2

Examples of GC-MS data for triterpenoid methyl ethers in sediment extracts: (a) m/z 440 mass fragmentogram for sample GKR-08, (b) m/z 440 mass fragmentogram for sample GKR-02, (c) mass spectrum of sawamilletin, (d) mass spectrum of miliacin, (e) mass spectrum of iso-sawamilletin, and (f) mass spectrum of arundoin.

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