Temperature mediated extraction of oil from safflower seeds: modelling and optimization of extraction parameters by response surface methodology approach
Safflower seed oil reveals well known therapeutic values. Response surface methodology (RSM), an effective statistical tool was used to study the enhancement of its oil percentage. A central composite design was applied to evaluate effects of four independent parameters like seed amount, reaction time, volume of hexane and temperature on oil extraction from its seeds. Oil percentage has been estimated as 22.76%, 21.73% and 25.1% respectively after thermal pretreatment for 10, 20 and 30 min. The optimized parameters were obtained as 3 g for the amount of seeds, 30 min for extraction process, 30 ml for volume of hexane and 45 °C temperature after applying RSM. The predicted oil percentage was obtained as 31.968% by second order polynomial equation while the estimated oil percentage was 50.12% for the optimum parameters. The oil percentage has been enhanced almost two times by using RSM. Statistically, the optimization of extraction parameters for the maximum oil recovery may add a positive value in the safflower crop with world economy.
KeywordsSafflower seed oil Thermal pretreatment Response surface methodology Oil percentage
The authors thank Banasthali University for providing necessary lab facilities. We would also like to thank Dr. Jagdish Singh, RVS agricultural university, Agriculture college campus, Indore, India for providing safflower varieties. This research did not receive any specific grant from finding agencies in the public, commercial or not for profit sector.
Compliance with ethical standards
Conflict of interest
Authors declared no conflict of interest.
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