International Journal of Analytical Chemistry / 2010 / Article / Fig 3

Research Article

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

Figure 3

Examples of GC-MS data for triterpenoid esters in sediment extracts: (a) m/z 218 mass fragmentogram for amyrinyl esters, (b) mass spectrum of β-amyrinyl acetate, (c) mass spectrum of β-amyrinyl hexanoate, (d) mass spectrum of lupeyl acetate, (e) mass spectrum of lupeyl hexanoate, and (f) mass spectrum of germanicyl acetate.
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