Separation and determination of metal ions based on the formation of chelate anions with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid (1N2, 7O3, 6S) was studied by rising HPCE of the nine metal ions examin...Separation and determination of metal ions based on the formation of chelate anions with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid (1N2, 7O3, 6S) was studied by rising HPCE of the nine metal ions examined, the ions that can be detected sensitively with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid were Fe2+, Co2+, Cu2+, Ni2+, Zn2+ and Pd2+. The cobalt chelate could exist in two oxidation states of cobalt. When TBA(+) were added in electrophoretic solutions, the drastic changes in elertrophoretic mobilities of chelate were observed, which was due to the ion association between chelates anions and TBA(+). The ion association constants of chelate anions with TBA(+) were determined by using the change in electrophoretic mobilities of chelates, metal ions tested were separated within 10 min using 30cm silica capillary (50 m i. d).展开更多
To evaluate the quality of Pollen Typhae as used in traditional Chinese medicine,a high-performance capillary electrophoresis(HPCE)method has been developed,validated and applied to chromatographic fingerprinting and ...To evaluate the quality of Pollen Typhae as used in traditional Chinese medicine,a high-performance capillary electrophoresis(HPCE)method has been developed,validated and applied to chromatographic fingerprinting and quantitation of its eight main bioactive flavonoids(naringenin,isorhamnetin 3-0-(2^(G)-α-L-rhamnosy)-rutinoside,rhamnetin 3-0-neohesperidoside,isorhamnetin,quercetin 3-0-(2^(G)-α-L-rhamnosyl)-rutinoside,quercetin 3-O-neohesperidoside,kaempferol and quer-cetin).Fingerprinting was based on the selection of nine characteristic chromatographic peaks.In quantitative analysis,the recovery of all eight compounds was in the range 98.5-102.2% with good linearity(r^(2)>0.9919)over a relatively wide concentration range.The assay was successfully applied to the analysis of the eight bioactive flavonoids in 14 different samples.The results indicate that the assay is reproducible and precise and can be used for convenient quality assessment of Pollen Typhae.展开更多
目的采用高效毛细管电泳法测定玉米花粉多糖中单糖的组成。方法玉米花粉多糖水解后,经α-萘胺衍生化,高效毛细管电泳分析。电泳条件:缓冲液为75 mm o l/L硼砂溶液(pH 9.5);柱温22℃;电压16 kV;检测波长200 nm;气压进样,进样时间5 s。结...目的采用高效毛细管电泳法测定玉米花粉多糖中单糖的组成。方法玉米花粉多糖水解后,经α-萘胺衍生化,高效毛细管电泳分析。电泳条件:缓冲液为75 mm o l/L硼砂溶液(pH 9.5);柱温22℃;电压16 kV;检测波长200 nm;气压进样,进样时间5 s。结果玉米花粉多糖主要是由葡萄糖、阿拉伯糖和半乳糖3种单糖组成。结论高效毛细管电泳可用于测定多糖中单糖的组成。展开更多
文摘Separation and determination of metal ions based on the formation of chelate anions with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid (1N2, 7O3, 6S) was studied by rising HPCE of the nine metal ions examined, the ions that can be detected sensitively with 1-Nitroso-2, 7-dihydrexynaphthalene-3, 6-disulfonic acid were Fe2+, Co2+, Cu2+, Ni2+, Zn2+ and Pd2+. The cobalt chelate could exist in two oxidation states of cobalt. When TBA(+) were added in electrophoretic solutions, the drastic changes in elertrophoretic mobilities of chelate were observed, which was due to the ion association between chelates anions and TBA(+). The ion association constants of chelate anions with TBA(+) were determined by using the change in electrophoretic mobilities of chelates, metal ions tested were separated within 10 min using 30cm silica capillary (50 m i. d).
基金The authors are grateful for financial support for this project as an Opening Project of the Jiangsu Key Laboratory of Chinese Medicine Processing(ZYPZ007)by the Priority Academic Program Development of Jiangsu Higher Education Institutions(ysxk-2010).
文摘To evaluate the quality of Pollen Typhae as used in traditional Chinese medicine,a high-performance capillary electrophoresis(HPCE)method has been developed,validated and applied to chromatographic fingerprinting and quantitation of its eight main bioactive flavonoids(naringenin,isorhamnetin 3-0-(2^(G)-α-L-rhamnosy)-rutinoside,rhamnetin 3-0-neohesperidoside,isorhamnetin,quercetin 3-0-(2^(G)-α-L-rhamnosyl)-rutinoside,quercetin 3-O-neohesperidoside,kaempferol and quer-cetin).Fingerprinting was based on the selection of nine characteristic chromatographic peaks.In quantitative analysis,the recovery of all eight compounds was in the range 98.5-102.2% with good linearity(r^(2)>0.9919)over a relatively wide concentration range.The assay was successfully applied to the analysis of the eight bioactive flavonoids in 14 different samples.The results indicate that the assay is reproducible and precise and can be used for convenient quality assessment of Pollen Typhae.
文摘目的采用高效毛细管电泳法测定玉米花粉多糖中单糖的组成。方法玉米花粉多糖水解后,经α-萘胺衍生化,高效毛细管电泳分析。电泳条件:缓冲液为75 mm o l/L硼砂溶液(pH 9.5);柱温22℃;电压16 kV;检测波长200 nm;气压进样,进样时间5 s。结果玉米花粉多糖主要是由葡萄糖、阿拉伯糖和半乳糖3种单糖组成。结论高效毛细管电泳可用于测定多糖中单糖的组成。
