[Objectives] To optimize the extraction process of Herba Lycopi polysaccharide by cellulase,and study its antioxidant activity.[Methods]The single factor test and orthogonal test were conducted to study the effect of ...[Objectives] To optimize the extraction process of Herba Lycopi polysaccharide by cellulase,and study its antioxidant activity.[Methods]The single factor test and orthogonal test were conducted to study the effect of p H,enzyme dosage,enzymolysis temperature and extraction time on the extraction of Herba Lycopi polysaccharide. And the test was done about its scavenging effect on DPPH radicals and superoxide anions,and the antioxidant activity was evaluated. [Results] The optimum extraction process by cellulase method was as follows: p H value of 7; enzyme dosage of 4 ml; enzymolysis temperature of 40 ℃; extraction time of 2. 5 h. The average extraction rate of Herba Lycopi polysaccharide was 10. 70%,and RSD was 0. 17%. The antioxidant activity test showed that Herba Lycopi polysaccharide had a significant scavenging effect on radicals. [Conclusions] Herba Lycopi polysaccharides had strong antioxidant activity,and could provide a scientific basis for the development and utilization of Herba Lycopi medicinal resources.展开更多
目的:建立泽兰中迷迭香酸的含量测定方法,为《欧洲药典》泽兰专论的质量标准提供研究数据。方法:采用高效液相色谱法。基于样品提取和色谱条件的优化结果建立迷迭香酸的分析方法,同时对该方法进行系统的方法学验证,包括采用单变量分析(O...目的:建立泽兰中迷迭香酸的含量测定方法,为《欧洲药典》泽兰专论的质量标准提供研究数据。方法:采用高效液相色谱法。基于样品提取和色谱条件的优化结果建立迷迭香酸的分析方法,同时对该方法进行系统的方法学验证,包括采用单变量分析(OVAT)进行方法的耐用性研究及按照《欧洲药典》的方法测定该色谱系统的滞留体积。结果:迷迭香酸检测质量浓度线性范围为5.02~60.30μg·m L^(-1)(r=0.999 9);加样回收率为95.5%~101.6%,RSD=2.1%(n=9);重复性、中间精密度、稳定性及耐用性试验的RSD均小于3.0%;该色谱系统滞留体积为2.4 m L。结论:该方法操作简单,重复性、准确度及耐用性良好,可作为泽兰中迷迭香酸的含量测定方法列入《欧洲药典》泽兰专论的质量标准草案。展开更多
优化了泽兰V(乙醇)∶V(水)=70∶30提取物的分离条件。采用反相高效液相色谱法(RP-HPLC)考察了不同波长、酸抑制剂类型及其浓度、流动相梯度、进样量以及柱温对其分离效果的影响。确定其分离条件如下:Hypersil ODS2色谱柱(5μm,4.6 mm i....优化了泽兰V(乙醇)∶V(水)=70∶30提取物的分离条件。采用反相高效液相色谱法(RP-HPLC)考察了不同波长、酸抑制剂类型及其浓度、流动相梯度、进样量以及柱温对其分离效果的影响。确定其分离条件如下:Hypersil ODS2色谱柱(5μm,4.6 mm i.d.×250 mm);流速1.0 mL/m in;检测波长280 nm;流动相:(A)(甲酸)=0.75%的水溶液(以下简称为X%Y-水,其中X为数字,Y为水中的添加剂),(B)乙腈;梯度洗脱条件为:φ(B)=10%(5 m in)65 m inφ(B)=55%;进样量为20μL;柱温30℃。该方法获得的色谱图基线较平稳,分离度较高,能有效地对泽兰化学成分进行分析,可用于泽兰的质量控制。展开更多
基金Supported by Key Traditional Chinese Medicine Discipline Construction Project of State Administration of Traditional Chinese Medicine during the 12th"FiveYear"Plan Period[Guo Zhong Yi Yao Ren Jiao Fa(2012)32]Guangxi Key Discipline Construction Project[Gui Jiao Ke Yan(2013)16]+2 种基金Guangxi College Science and Technology Innovation Ability Construction Project and Key Laboratory Project of Guangxi's Colleges for the Study of Characteristic Ethnic Medicine in Youjiang River Basin[Gui Jiao Ke Yan(2014)14]Innovation and Entrepreneurship-Chinese Medicine Teaching Team Project at the Autonomous Regional Level,and Teaching Quality and Teaching Reform Project of Guangxi's Colleges and Universities in 2016[Gui Jiao Gao Jiao(2015)93&(2016)6]College Students' Innovative Training Project of Youjiang Medical University for Nationalities in 2014(XCXB201424)
文摘[Objectives] To optimize the extraction process of Herba Lycopi polysaccharide by cellulase,and study its antioxidant activity.[Methods]The single factor test and orthogonal test were conducted to study the effect of p H,enzyme dosage,enzymolysis temperature and extraction time on the extraction of Herba Lycopi polysaccharide. And the test was done about its scavenging effect on DPPH radicals and superoxide anions,and the antioxidant activity was evaluated. [Results] The optimum extraction process by cellulase method was as follows: p H value of 7; enzyme dosage of 4 ml; enzymolysis temperature of 40 ℃; extraction time of 2. 5 h. The average extraction rate of Herba Lycopi polysaccharide was 10. 70%,and RSD was 0. 17%. The antioxidant activity test showed that Herba Lycopi polysaccharide had a significant scavenging effect on radicals. [Conclusions] Herba Lycopi polysaccharides had strong antioxidant activity,and could provide a scientific basis for the development and utilization of Herba Lycopi medicinal resources.
文摘目的:建立泽兰中迷迭香酸的含量测定方法,为《欧洲药典》泽兰专论的质量标准提供研究数据。方法:采用高效液相色谱法。基于样品提取和色谱条件的优化结果建立迷迭香酸的分析方法,同时对该方法进行系统的方法学验证,包括采用单变量分析(OVAT)进行方法的耐用性研究及按照《欧洲药典》的方法测定该色谱系统的滞留体积。结果:迷迭香酸检测质量浓度线性范围为5.02~60.30μg·m L^(-1)(r=0.999 9);加样回收率为95.5%~101.6%,RSD=2.1%(n=9);重复性、中间精密度、稳定性及耐用性试验的RSD均小于3.0%;该色谱系统滞留体积为2.4 m L。结论:该方法操作简单,重复性、准确度及耐用性良好,可作为泽兰中迷迭香酸的含量测定方法列入《欧洲药典》泽兰专论的质量标准草案。
文摘优化了泽兰V(乙醇)∶V(水)=70∶30提取物的分离条件。采用反相高效液相色谱法(RP-HPLC)考察了不同波长、酸抑制剂类型及其浓度、流动相梯度、进样量以及柱温对其分离效果的影响。确定其分离条件如下:Hypersil ODS2色谱柱(5μm,4.6 mm i.d.×250 mm);流速1.0 mL/m in;检测波长280 nm;流动相:(A)(甲酸)=0.75%的水溶液(以下简称为X%Y-水,其中X为数字,Y为水中的添加剂),(B)乙腈;梯度洗脱条件为:φ(B)=10%(5 m in)65 m inφ(B)=55%;进样量为20μL;柱温30℃。该方法获得的色谱图基线较平稳,分离度较高,能有效地对泽兰化学成分进行分析,可用于泽兰的质量控制。