[目的]探讨微波法提取益母草中总生物碱的效果并确定其最佳工作参数。[方法]以常规的回流提取法作为对照,利用微波加热技术对益母草中总生物碱进行微波提取,研究料液比、微波提取时间、微波提取功率等因素对提取效果的影响,确定最佳的...[目的]探讨微波法提取益母草中总生物碱的效果并确定其最佳工作参数。[方法]以常规的回流提取法作为对照,利用微波加热技术对益母草中总生物碱进行微波提取,研究料液比、微波提取时间、微波提取功率等因素对提取效果的影响,确定最佳的提取条件。[结果]微波时间为8 m in,微波功率为616 W时,基本可以提取完全。微波提取的料液比约为1∶15,从安全性能角度考虑,选择3 g样品加入50 m l提取剂的比例进行微波提取效果比较理想。[结论]该方法作为一种新的中药有效成分提取方法,具有良好的重复性和较好的精密度和准确度,有着广泛的发展前景。展开更多
Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditi...Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditions of combustion temperatures,sample pH values of sample,mole ratios of the mixed iron and stirring mode with aeration or supersonic wave as well as magnetic,the degradation effects on COD removal from the wastewater has been investigated.The nano-TiO2 has shown a higher catalytic activation at 600℃,and the removal rate of 80% or 72% is reached under conditions of pH of 4.5 and 3h of radiation with UV or sunshine respectively,while at pH of 2.0,the same treatment give 83% or 78% removal rate respectively.Under conditions of sunshine,600℃ and pH of 4.5,the nano-TiO2 mixed with iron of 0.8% get removal of 85%.The stirring mode has an influence on the COD removal,under the above conditions,stirring with aeration for 20min get a higher removal of 19% or 10% than that with supersonics wave or magnetic power,but after 40min,stirring with magnetic power get the highest removal rate.展开更多
文摘[目的]探讨微波法提取益母草中总生物碱的效果并确定其最佳工作参数。[方法]以常规的回流提取法作为对照,利用微波加热技术对益母草中总生物碱进行微波提取,研究料液比、微波提取时间、微波提取功率等因素对提取效果的影响,确定最佳的提取条件。[结果]微波时间为8 m in,微波功率为616 W时,基本可以提取完全。微波提取的料液比约为1∶15,从安全性能角度考虑,选择3 g样品加入50 m l提取剂的比例进行微波提取效果比较理想。[结论]该方法作为一种新的中药有效成分提取方法,具有良好的重复性和较好的精密度和准确度,有着广泛的发展前景。
文摘Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditions of combustion temperatures,sample pH values of sample,mole ratios of the mixed iron and stirring mode with aeration or supersonic wave as well as magnetic,the degradation effects on COD removal from the wastewater has been investigated.The nano-TiO2 has shown a higher catalytic activation at 600℃,and the removal rate of 80% or 72% is reached under conditions of pH of 4.5 and 3h of radiation with UV or sunshine respectively,while at pH of 2.0,the same treatment give 83% or 78% removal rate respectively.Under conditions of sunshine,600℃ and pH of 4.5,the nano-TiO2 mixed with iron of 0.8% get removal of 85%.The stirring mode has an influence on the COD removal,under the above conditions,stirring with aeration for 20min get a higher removal of 19% or 10% than that with supersonics wave or magnetic power,but after 40min,stirring with magnetic power get the highest removal rate.
