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Strongly odorous compounds may be formed upon addition of hydrogen sulphide to unsaturated carbonyl compounds. The reaction between hydrogen sulphide and 2-butenal was studied, and the characteristics of the flavour, the structure and some of the physical chemical characteristics of the reaction products were determined. The influence of the pH on the type of components formed in dilute aqueous solution was investigated.

SUMMARY The application of combined capillary‐column gas chromatography and mass spectrometry in analysis of the volatile components of a heavy‐body Jamaica rum is described. Pre‐fractionation of the complex essencew ontaining components in widely differing concentrations—was performed on a packed column previous to further analysis on the capillary column. A large number of esters, aldehydes, acetals, and alcohols were identified.

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