Volatile compounds ginger

Volatile Compounds in Ginger Oil Generated by Thermal Treatment... 

The present study compares the capillary GC analysis of volatile compounds derived from steam distillation of ginger with those extracted by liquid carbon dioxide. Volatile components affected by thermal treatment during preparation were of major concern. 

Volatile compounds of ginger were collected and determined by gas chromatography and GC-MS. Slices of ginger were boiled for making a traditional Chinese ginger soup for panel triangle test. 

Wu, J.J. Yang, J.S. Effects of y-irradiation on the volatile compounds of ginger rhizome Zingiber officinale Ro-scoe). J. Agric. Food Chem. 1994a, 42, 2574—2577. 

The resinoids described above should be distinguished from prepared oleoresins (e.g., pepper, ginger, and vanilla oleoresins), which are concentrates prepared from spices by solvent extraction. The solvent that is used depends on the spice currently, these products are often obtained by extraction with supercritical carbon dioxide [223a]. Pepper and ginger oleoresins contain not only volatile aroma compounds, but also substances responsible for pungency. 

Thermal treatment, such as steam distillation during sample preparation, will cause considerable degradative reaction to both volatile and nonvolatile compounds of ginger. To the contrary, however, preparation under low temperature, such as liquid carbon dioxide extraction, can effectively eliminate thermally induced degradative reactions. 

Ginger oleoresin should contain predominantly the aroma and pungency contributed mainly by the volatile oils, gingerols and related compounds. 

Ginger is one of the most extensively used spices because of its wide range of application. It is used fresh and in the preserved or dried form. The potential of ginger in the culinary, non-culinary and medicinal fields is based on the chemistry of volatile oil and non-volatile pungent principles. The oil yield is about 2-3% and the oil consists of 64% sesquiterpene hydrocarbons, 6% carbonyl compounds,... 

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