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首页> 外文期刊>Quality Assurance and Safety of Crops & Foods >Improving the oil yield of Iranian Jatropha curcas seeds by optimising ultrasound-assisted ethanolic extraction process: a response surface method
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Improving the oil yield of Iranian Jatropha curcas seeds by optimising ultrasound-assisted ethanolic extraction process: a response surface method

机译：改善伊朗石油产量的麻风树通过优化种子ultrasound-assisted ethanolic提取工艺:响应面方法

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摘要

An ultrasound-assisted solvent extraction (UASE) procedure has been optimised to speed up oil extraction from Jatropha curcas L. seeds by response surface methodology-Box-Behnken design (RSM-BBD). The preliminary study to determine the best solvent for extracting oil from J. curcas containing more than 60% oil revealed that ethanol had the highest efficiency among chloroform, acetone, n-hexane and methanol. Three independent variables including UASE time (10-60 min), UASE temperature (30-60 degrees C) and ratio of ethanol to sample (15: 45, v/w) were investigated to achieve the highest oil yield. RSM-BBD demonstrated that a second-order polynomial model can adequately be developed with a high R-2 (0.9952) using multiple linear regression analysis. The linear effect of ethanol to sample ratio had the most significant (P<0.05) effect on yield value. The most suitable combination of variables for higher yield increase (61.94%) was UASE time of 51.69 min, UASE temperature of 44.57 degrees C and a ratio of ethanol to the sample of 44.78 (v/w). At this optimal condition, the yield increased to 62.12%, which was close to the amount predicted by the model which was nearly 2.5x more than the obtained yield in the Soxhlet extraction procedure (25.63%). Gas chromatography-mass spectrometry of the oils extracted under optimal conditions showed that the most dominant fatty acids were oleic (26.15%), linoelic (24.21%), palmitic (21.09%) and stearic (6.28%) acids, respectively.
机译：一个ultrasound-assisted溶剂萃取(UASE)过程已经优化,加快石油从麻风树中提取l .种子响应面methodology-Box-Behnken设计(RSM-BBD)。从j . curcas最佳溶剂提取石油含有60%以上的石油发现乙醇中效率最高氯仿、丙酮、正己烷和甲醇。独立变量包括UASE时间(60分钟),UASE(30 - 60度)和温度乙醇比样本(15:45 v / w)调查达到最高的石油产量。RSM-BBD证明二阶多项式模型可以充分开发使用多元线性高r2 (0.9952)回归分析。样品比最显著(P < 0.05)影响屈服值。组合的变量为更高的收益率增加(61.94%)是UASE时间51.69分钟,UASE温度44.57摄氏度,比44.78样品的乙醇(v / w)。最优条件下,收益率上升至62.12%,这是接近预测的数量模型近2.5倍以上在索氏提取获得的收益率过程(25.63%)。谱下油提取的最优条件表明,最主要的脂肪十八烯酸(26.15%)、linoelic (24.21%),十六烷酸(21.09%)、硬脂酸(6.28%),分别。

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