Vol. 10, Issue 10 (2021)

Author(s):
Rajeshwari S and Athmaselvi KA

Abstract:
The present study was done to evaluate the effects of Microwave pretreatment parameters which includes irradiation time and power on theoil extraction yield and some selected physicochemical properties of the extracted oils includingcolor, refractive index, specific gravity, saponification, iodine and peroxide values of the extracted oil of Garden cress seeds with the use of solvent extraction. The extraction method was optimized using different processing durations of 3, 5, and 7 minutes, as well as microwave strengths of 960, 1080, and 1200 W. Central Composite Design was used to undertake statistical analysis and process optimization. The optimization of process parameter was done based on higher extraction of Garden cress seed oil and process parameters were identified as microwave power 1200W and treatment time of 7 mins. According to the results it was found that enhancement in the microwave power and the treatment time increased the extraction of oil.The oil yield by Microwave pretreatment was considerably increased upto 10.3% as compared to oil sample without treatment. The quality evaluation of microwave pretreated extracted oil was found and compared with the control sample. The range of all physicochemical quality parameters were compatible within the acceptable limits as stated by international standard for edible oils. The quality of the oil obtained by microwave heating pretreatment was determined and is commensurate to the control sample.From this study it can be concluded that the Garden cress seed oil yield and quality can be improved by pretreatment of microwave prior to oil extraction.