Response surface methodology was used to optimize the extraction conditions of oil from watermelon seeds. Based on single factor experiments, the material to liquid ratio, extraction time and extraction solvent exhibi...Response surface methodology was used to optimize the extraction conditions of oil from watermelon seeds. Based on single factor experiments, the material to liquid ratio, extraction time and extraction solvent exhibited the highest effects on oil extraction. The mathematical model was established according to the Box-Behnken central composite design. The optimal extraction conditions consisted of a material to liquid ratio of 1:16.3 (g/ml), an extraction time of 45.4 min, and petroleum ether as the organic solvent. The predicted and actual yields of watermelon seed oil were 27.92% and 28.04%, respectively. The extracted oil was analyzed by GC-MS. The results revealed that watermelon seed oil contained several types of acids and esters ; the relative percentages of the components were determined by a normalization method. The main fatty acids included linoleic acid, palmitic acid, oleic acid, and stearic acid, which accounted for 91.24% of the total components.展开更多
以西瓜籽为原料,研究水酶法提取西瓜籽油的最优工艺并对其脂肪酸组成、理化特性进行分析。在单因素实验基础上,采用混料设计对复合酶不同配比进行优化。得到的最优分步酶解条件为:首先采用复合酶(纤维素酶、果胶酶、半纤维素酶)配比0.68...以西瓜籽为原料,研究水酶法提取西瓜籽油的最优工艺并对其脂肪酸组成、理化特性进行分析。在单因素实验基础上,采用混料设计对复合酶不同配比进行优化。得到的最优分步酶解条件为:首先采用复合酶(纤维素酶、果胶酶、半纤维素酶)配比0.68∶0.22∶0.10,复合酶添加量2.0%,在p H 5.0、酶解温度50℃、液料比7∶1条件下酶解2 h;然后加入1.5%的碱性蛋白酶,在p H 7.5、酶解温度55℃条件下继续酶解2 h。在最优分步酶解条件下,西瓜籽油提取率为91.45%。所得西瓜籽油色泽淡黄,澄清透明,富含不饱和脂肪酸,其理化指标符合国家食用油卫生标准。展开更多
采用超临界CO2流体萃取方法从西瓜籽中提取西瓜籽油。利用正交实验探讨萃取压力、萃取温度、萃取时间、夹带剂用量对西瓜籽油萃取率的影响。结果表明,影响西瓜籽油萃取率的因素主次顺序为:萃取压力>萃取时间>萃取温度>夹带剂用...采用超临界CO2流体萃取方法从西瓜籽中提取西瓜籽油。利用正交实验探讨萃取压力、萃取温度、萃取时间、夹带剂用量对西瓜籽油萃取率的影响。结果表明,影响西瓜籽油萃取率的因素主次顺序为:萃取压力>萃取时间>萃取温度>夹带剂用量;最佳提取条件为萃取压力40 MPa,萃取温度45℃,萃取时间150 m in,夹带剂乙醇用量7%。在最佳条件下西瓜籽油萃取率为52.18%。展开更多
基金Supported by Fund for Independent Innovation of Agricultural Science in Jiangsu Province(CX-125067)
文摘Response surface methodology was used to optimize the extraction conditions of oil from watermelon seeds. Based on single factor experiments, the material to liquid ratio, extraction time and extraction solvent exhibited the highest effects on oil extraction. The mathematical model was established according to the Box-Behnken central composite design. The optimal extraction conditions consisted of a material to liquid ratio of 1:16.3 (g/ml), an extraction time of 45.4 min, and petroleum ether as the organic solvent. The predicted and actual yields of watermelon seed oil were 27.92% and 28.04%, respectively. The extracted oil was analyzed by GC-MS. The results revealed that watermelon seed oil contained several types of acids and esters ; the relative percentages of the components were determined by a normalization method. The main fatty acids included linoleic acid, palmitic acid, oleic acid, and stearic acid, which accounted for 91.24% of the total components.
文摘以西瓜籽为原料,研究水酶法提取西瓜籽油的最优工艺并对其脂肪酸组成、理化特性进行分析。在单因素实验基础上,采用混料设计对复合酶不同配比进行优化。得到的最优分步酶解条件为:首先采用复合酶(纤维素酶、果胶酶、半纤维素酶)配比0.68∶0.22∶0.10,复合酶添加量2.0%,在p H 5.0、酶解温度50℃、液料比7∶1条件下酶解2 h;然后加入1.5%的碱性蛋白酶,在p H 7.5、酶解温度55℃条件下继续酶解2 h。在最优分步酶解条件下,西瓜籽油提取率为91.45%。所得西瓜籽油色泽淡黄,澄清透明,富含不饱和脂肪酸,其理化指标符合国家食用油卫生标准。
文摘采用超临界CO2流体萃取方法从西瓜籽中提取西瓜籽油。利用正交实验探讨萃取压力、萃取温度、萃取时间、夹带剂用量对西瓜籽油萃取率的影响。结果表明,影响西瓜籽油萃取率的因素主次顺序为:萃取压力>萃取时间>萃取温度>夹带剂用量;最佳提取条件为萃取压力40 MPa,萃取温度45℃,萃取时间150 m in,夹带剂乙醇用量7%。在最佳条件下西瓜籽油萃取率为52.18%。