A rapid method for the simultaneous determination of berberine(BBR),matrine(MT)and oxymatrine(OMT)by nonaqueous capillary electrophoresis(NACE)was developed.Optimum separation of the analytes was obtained on a 50cm...A rapid method for the simultaneous determination of berberine(BBR),matrine(MT)and oxymatrine(OMT)by nonaqueous capillary electrophoresis(NACE)was developed.Optimum separation of the analytes was obtained on a 50cm×50μm i.d.fused-silica capillary using a non-aqueous buffer system of 70mM ammonium acetate,7.0% acetic acid and 10% acetonitrile at 25kV and 20℃.The relative standard deviations(R.S.D.)of the migration times and peak areas of the three active components were 0.06%-0.20% and 0.12%-3.41% for berberine,0.11%-0.60% and 0.74%-1.63% for matrine,0.15% and 0.45% for oxymatrine,respectively.Detection limits of berberine,matrine and oxymtrine were 0.18μg/mL,4.08μg/mL and 4.16μg/mL,respectively.In the tested concentration range,good linear relationships(0.9992 for berberine,0.9988 for matrine and 0.9988 for oxymatrine)were observed.The linear calibration ranges were 0.45-360.0μg/mL for berberine,8.16-408.0μg/mL for matrine and 20.8-416.0μg/mL for oxymatrine.This method has been successfully applied to the phytochemical analysis of alkaloids extracts from two commonly used traditional Chinese herbal drugs:Sophora flavescens Ait.(Kushen)and Cortex phellodendri chinensis(Huangbai)and their medicinal preparations.展开更多
A successful chiral separation of N-benzoyl phenylalanine methyl ester has been achieved by nonaqueous capillary electrophoresis (NACE) using P-CD as chiral selector in formamide (FA). Some experimental parameters inf...A successful chiral separation of N-benzoyl phenylalanine methyl ester has been achieved by nonaqueous capillary electrophoresis (NACE) using P-CD as chiral selector in formamide (FA). Some experimental parameters influencing the chiral separation such as concentration of P-CD, ionic strength and apparent pH (pH*) are discussed.展开更多
In the nonaqueous N,N -dimethylformamide medium, the chiral drugs ibuprofen and terbutaline were successfully separated with sulfonyl- β -cyclodextrin(s- β -CD) as the chiral selector by capillary electrophoresis wi...In the nonaqueous N,N -dimethylformamide medium, the chiral drugs ibuprofen and terbutaline were successfully separated with sulfonyl- β -cyclodextrin(s- β -CD) as the chiral selector by capillary electrophoresis with conductance detection. The comparison of the effects of three CDS( β -CD, diethylic- β -CD, sulfonyl- β -CD) on the chiral separation was made and the resolution mechanism was proposed.展开更多
Two active principles in traditional Chinese medicine Magnolia officinalis, magnolol and honokiol, were successfully separated by means of nonaqueous capillary electrophoresis. The effect of the composition of a nonaq...Two active principles in traditional Chinese medicine Magnolia officinalis, magnolol and honokiol, were successfully separated by means of nonaqueous capillary electrophoresis. The effect of the composition of a nonaqueous buffer on column efficiency and resolution, and the effect of acid additives on peak shapes were researched. The separation was conducted with a running buffer in a mixture of methanol/aeetonitrile/formamide ( volume ratio : 1 : 2 : 2 ), in which the concentrations of Tris, acetic acid, and water were 60 retool/L, 0. 04 mmol/L and 5% ( volume fration), respectively, and the pH^* (apperent pH) of the running buffer was 8.96. Magnolol and honokiol were separated on baseline within 20 min. The relative standard deviation of the analytes' concentrations in the sample is 1.32% for magnolol and 1.60% for honokiol, and the recoveries of the spiked sample are 98.4% for magnolol and 98. 0% for honokiol, respectively.展开更多
为方便读者快速了解毛细管电泳(capillary electrophoresis, CE)技术在2023年的发展,根据国际通用学术水平评价指标之一的影响因子(IF)选择期刊,结合与CE技术紧密相关的实验类工作回顾了2023年的重要研究和应用进展。在ISI Web of Scie...为方便读者快速了解毛细管电泳(capillary electrophoresis, CE)技术在2023年的发展,根据国际通用学术水平评价指标之一的影响因子(IF)选择期刊,结合与CE技术紧密相关的实验类工作回顾了2023年的重要研究和应用进展。在ISI Web of Science数据库中通过主题检索所获得的2023年CE技术相关的669篇研究论文中,重点介绍了IF大于10.0的Nature Communications,Nucleic Acids Research,Engineering,Journal of Medical Virology和Carbohydrate Polymers发表的5篇实验类论文;IF为5.0~10.0的代表性期刊Analytical Chemistry,Analytica Chimica Acta,Talanta和Food Chemistry的31篇实验类论文;对IF小于5.0但CE技术报道较为集中的Journal of Chromatography A和Electrophoresis以及国内重要中文核心期刊(北京大学)中的代表性实验研究进行了概述。2023年,IF≥10.0期刊报道的最新科研进展都是使用已报道的CE方法,为CE技术的推广应用提供了新的突破口。此外,CE与质谱的新应用研究依旧是热点;CE在3D打印和水下工作系统等硬件方面的报道增加,在固体颗粒、细胞囊泡、细胞、病毒和细菌等非溶液样品分析中有较大突破,在药物和成分分析方面依旧保持优势。中文期刊方面,CE应用论文数量多于往年,尤其是在印刷领域的新应用十分抢眼。展开更多
基金supported by the National Natural Science Foundation of China(No.30730110)
文摘A rapid method for the simultaneous determination of berberine(BBR),matrine(MT)and oxymatrine(OMT)by nonaqueous capillary electrophoresis(NACE)was developed.Optimum separation of the analytes was obtained on a 50cm×50μm i.d.fused-silica capillary using a non-aqueous buffer system of 70mM ammonium acetate,7.0% acetic acid and 10% acetonitrile at 25kV and 20℃.The relative standard deviations(R.S.D.)of the migration times and peak areas of the three active components were 0.06%-0.20% and 0.12%-3.41% for berberine,0.11%-0.60% and 0.74%-1.63% for matrine,0.15% and 0.45% for oxymatrine,respectively.Detection limits of berberine,matrine and oxymtrine were 0.18μg/mL,4.08μg/mL and 4.16μg/mL,respectively.In the tested concentration range,good linear relationships(0.9992 for berberine,0.9988 for matrine and 0.9988 for oxymatrine)were observed.The linear calibration ranges were 0.45-360.0μg/mL for berberine,8.16-408.0μg/mL for matrine and 20.8-416.0μg/mL for oxymatrine.This method has been successfully applied to the phytochemical analysis of alkaloids extracts from two commonly used traditional Chinese herbal drugs:Sophora flavescens Ait.(Kushen)and Cortex phellodendri chinensis(Huangbai)and their medicinal preparations.
文摘A successful chiral separation of N-benzoyl phenylalanine methyl ester has been achieved by nonaqueous capillary electrophoresis (NACE) using P-CD as chiral selector in formamide (FA). Some experimental parameters influencing the chiral separation such as concentration of P-CD, ionic strength and apparent pH (pH*) are discussed.
基金Supported by the Natural Science Foundation of Guangxi Province(No.9912 0 0 1)
文摘In the nonaqueous N,N -dimethylformamide medium, the chiral drugs ibuprofen and terbutaline were successfully separated with sulfonyl- β -cyclodextrin(s- β -CD) as the chiral selector by capillary electrophoresis with conductance detection. The comparison of the effects of three CDS( β -CD, diethylic- β -CD, sulfonyl- β -CD) on the chiral separation was made and the resolution mechanism was proposed.
文摘Two active principles in traditional Chinese medicine Magnolia officinalis, magnolol and honokiol, were successfully separated by means of nonaqueous capillary electrophoresis. The effect of the composition of a nonaqueous buffer on column efficiency and resolution, and the effect of acid additives on peak shapes were researched. The separation was conducted with a running buffer in a mixture of methanol/aeetonitrile/formamide ( volume ratio : 1 : 2 : 2 ), in which the concentrations of Tris, acetic acid, and water were 60 retool/L, 0. 04 mmol/L and 5% ( volume fration), respectively, and the pH^* (apperent pH) of the running buffer was 8.96. Magnolol and honokiol were separated on baseline within 20 min. The relative standard deviation of the analytes' concentrations in the sample is 1.32% for magnolol and 1.60% for honokiol, and the recoveries of the spiked sample are 98.4% for magnolol and 98. 0% for honokiol, respectively.
文摘为方便读者快速了解毛细管电泳(capillary electrophoresis, CE)技术在2023年的发展,根据国际通用学术水平评价指标之一的影响因子(IF)选择期刊,结合与CE技术紧密相关的实验类工作回顾了2023年的重要研究和应用进展。在ISI Web of Science数据库中通过主题检索所获得的2023年CE技术相关的669篇研究论文中,重点介绍了IF大于10.0的Nature Communications,Nucleic Acids Research,Engineering,Journal of Medical Virology和Carbohydrate Polymers发表的5篇实验类论文;IF为5.0~10.0的代表性期刊Analytical Chemistry,Analytica Chimica Acta,Talanta和Food Chemistry的31篇实验类论文;对IF小于5.0但CE技术报道较为集中的Journal of Chromatography A和Electrophoresis以及国内重要中文核心期刊(北京大学)中的代表性实验研究进行了概述。2023年,IF≥10.0期刊报道的最新科研进展都是使用已报道的CE方法,为CE技术的推广应用提供了新的突破口。此外,CE与质谱的新应用研究依旧是热点;CE在3D打印和水下工作系统等硬件方面的报道增加,在固体颗粒、细胞囊泡、细胞、病毒和细菌等非溶液样品分析中有较大突破,在药物和成分分析方面依旧保持优势。中文期刊方面,CE应用论文数量多于往年,尤其是在印刷领域的新应用十分抢眼。