GLC determination of essential oils of cumin and fennel affected by different drying methods and salinity treatment

ABSTRACT

Gas liquid chromatography was used for the qualitative and quantitative determination of the essential oil constituents of cumin and fennel fruits grown under different salt-strees treatments. The effect of extraction and drying methods of microencapsulation are also investigated. Distillation method was more efficient than organic solvent method in extraction of Volatile oil. The data revealed that the yield of oil in both cumin and fennel increased with increasing in salinity levels up to 4000 ppm, and 6000 ppm, then a sharp decrease was observed with increasing the salinity to 8000 ppm. The data also showed that lyophilization drying method is the most effective method for microencapsulated oil, in which most of the components of the oil, as well as their ratios were nearly like the original oil