In this study a novel microwave-assisted extraction(MAE) device was presented. In this newly developed system, a 3/4 wavelength microwave resonance cavity was used as the microwave coupling device for replacing a trad...In this study a novel microwave-assisted extraction(MAE) device was presented. In this newly developed system, a 3/4 wavelength microwave resonance cavity was used as the microwave coupling device for replacing a traditional microwave oven. This device is used to extract flavonoids from Radix et caulis acanthopanacis senticosi. The effects of solvent concentration, microwave forward power and solvent uptake rate on the extraction yield of flavonoids were investigated by using orthogonal experimental design. The results show that the effects of the solvent(ethanol) concentration and solvent uptake rate on the extraction yield of flavonoids are very significant, the effect of the interaction of solvent concentration and solvent uptake rate is significant and the effects of the other factors are general. Under the optimal conditions of MAE the extraction yield of flavonoids by this system is 46% higher than that by Soxhlet method. The RSD of the method was lower than 6%.展开更多
草果为姜科植物草果(Amomum tsao-ko Crevost et Lemaire)的干燥成熟果实.主要产于云南、广西、贵州等地.草果的果实除作药用外,还是著名的香料和调味品.对于草果挥发油化学成分的分析虽已有报道,但对云南及广西产草果采用超临界CO2萃...草果为姜科植物草果(Amomum tsao-ko Crevost et Lemaire)的干燥成熟果实.主要产于云南、广西、贵州等地.草果的果实除作药用外,还是著名的香料和调味品.对于草果挥发油化学成分的分析虽已有报道,但对云南及广西产草果采用超临界CO2萃取法提取挥发油,并对其化学成分进行分析、比较,目前笔者尚未见报道.本实验采用了超临界流体萃取技术(SFE-CO2)分别提取了云南及广西产草果挥发油,用气相色谱-质谱联用技术检测了挥发油的化学成分.展开更多
文摘In this study a novel microwave-assisted extraction(MAE) device was presented. In this newly developed system, a 3/4 wavelength microwave resonance cavity was used as the microwave coupling device for replacing a traditional microwave oven. This device is used to extract flavonoids from Radix et caulis acanthopanacis senticosi. The effects of solvent concentration, microwave forward power and solvent uptake rate on the extraction yield of flavonoids were investigated by using orthogonal experimental design. The results show that the effects of the solvent(ethanol) concentration and solvent uptake rate on the extraction yield of flavonoids are very significant, the effect of the interaction of solvent concentration and solvent uptake rate is significant and the effects of the other factors are general. Under the optimal conditions of MAE the extraction yield of flavonoids by this system is 46% higher than that by Soxhlet method. The RSD of the method was lower than 6%.
文摘草果为姜科植物草果(Amomum tsao-ko Crevost et Lemaire)的干燥成熟果实.主要产于云南、广西、贵州等地.草果的果实除作药用外,还是著名的香料和调味品.对于草果挥发油化学成分的分析虽已有报道,但对云南及广西产草果采用超临界CO2萃取法提取挥发油,并对其化学成分进行分析、比较,目前笔者尚未见报道.本实验采用了超临界流体萃取技术(SFE-CO2)分别提取了云南及广西产草果挥发油,用气相色谱-质谱联用技术检测了挥发油的化学成分.