[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
A new 2D Zn(Ⅱ) coordination polymer [Zn(HIDC)(bix)0.5]n(1) was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid(H3IDC) and 1,4-bis(imidazol-1-ylmethyl)-benzene(bix) with a ...A new 2D Zn(Ⅱ) coordination polymer [Zn(HIDC)(bix)0.5]n(1) was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid(H3IDC) and 1,4-bis(imidazol-1-ylmethyl)-benzene(bix) with a 2:2:1 mole ratio.X-ray diffraction crystal structural analysis reveals it crystallizes in monoclinic,space group P21/n with a = 12.125(3),b = 10.541(3),c = 12.484(3) ,β = 115.834(4)°,V = 1436.0(6) 3,Mr = 338.60,Z = 4,Dc = 1.566 Mg·m-3,F(000) = 684,μ(MoKα) = 1.730 mm-1,the final R = 0.0439 and wR = 0.0888 for 2101 observed reflections with I ≥ 2σ(I).In 1,each zinc(Ⅱ) ion is five-coordinated with a slightly distorted trigonal bipy-ramidal coordination geometry,and each μ2-HIDC2-acts as a bridge to bond two neighboring Zn(Ⅱ) ions,leading to a 1D zigzag chain architecture.The adjacent zigzag chains are further linked by μ2-bix to form an infinite 2D network structure.The fluorescence spectrum of 1 exhibits intense emission at 466 nm when excited at 397 nm in solid state at room temperature.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A new 2D Zn(Ⅱ) coordination polymer [Zn(HIDC)(bix)0.5]n(1) was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid(H3IDC) and 1,4-bis(imidazol-1-ylmethyl)-benzene(bix) with a 2:2:1 mole ratio.X-ray diffraction crystal structural analysis reveals it crystallizes in monoclinic,space group P21/n with a = 12.125(3),b = 10.541(3),c = 12.484(3) ,β = 115.834(4)°,V = 1436.0(6) 3,Mr = 338.60,Z = 4,Dc = 1.566 Mg·m-3,F(000) = 684,μ(MoKα) = 1.730 mm-1,the final R = 0.0439 and wR = 0.0888 for 2101 observed reflections with I ≥ 2σ(I).In 1,each zinc(Ⅱ) ion is five-coordinated with a slightly distorted trigonal bipy-ramidal coordination geometry,and each μ2-HIDC2-acts as a bridge to bond two neighboring Zn(Ⅱ) ions,leading to a 1D zigzag chain architecture.The adjacent zigzag chains are further linked by μ2-bix to form an infinite 2D network structure.The fluorescence spectrum of 1 exhibits intense emission at 466 nm when excited at 397 nm in solid state at room temperature.