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The volatiles of fresh cherimoya (Annona cherimolia, Mill.) fruit pulp were separated by standard controlled high-vacuum distillation and solvent extraction (pentane-dichloromethane mixture, 2:1). After preseparation by adsorption chromatography on silica gel using a pentane-diethyl ether gradient, the three fractions obtained were analyzed by capillary gas chromatography and combined capillary gas chromatographic techniques, i.e., on-line mass spectrometry and FTIR spectroscopy. In total, 208 volatiles could be identified by these methods. Among them, 23 hydrocarbons, 58 esters, 54 alcohols, 47 carbonyls, and 26 volatiles of miscellaneous structures were found. Quantitatively, alcohols such as 1-butanol, 3-methyl-l-butanol, 1-hexanol, and linalool and a series of butanoates and 3-methylbutyl esters comprised the major part of the volatiles. Among different terpenes, some terpene esters and various bicyclic derivatives were remarkable.

The volatile acids extracted by pentane/dichloromethane (2 + 1) from tropical fruit pulps were identified and determined by capillary gas chromatography (HRGC) and combined capillary gas chromatography-mass spectrometry using EI- and CI mode (HRGC-EI/CIMS). In cherimoya (A. cherimolia, Mill.) fruit pulp 47 acids were characterized; major compounds were hexanoic (3 mg/kg) and octanoic (1 mg/kg) acid. Fifty one acids were identified in guava (P. guajava, L.), 54 in mango (M, indica, L., var. Alphonso) and 56 in papaya (C. papaya, L.). (E)-cinnamoic acid (0.4 mg/kg) and (Z)-3-hexenoic acid (0.2 mg/kg) were determined as major constituents in guava; in mango 5-hydroxy-(Z)-7-decenoic acid (2 mg/kg) and 3-hydroxyoctanoic acid (1.1 mg/kg) and in papaya pulp butanoic acid (1.2 mg/kg) were established as major constituents.

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