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题名: On-line Study of Aesculin and Aesculetin Hydrolysis Using Sweeping-Flow Injection-chip Micellar Electrokinetic Chromatography
其他题名: 在线测定秦皮甲素和秦皮乙素水解反应速率常数的扫集-流动注射- 芯片毛细管胶束电动色谱方法
作者: Zhu, HD; Chen, YL; Chen, HL; Chen, XG(陈兴国)
收录类别: SCIE ; CSCD
出版日期: 2016-04
刊名: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
卷号: 44, 期号:4, 页码:597-603
期刊主办单位: 中国化学会 ; 中国科学院长春应用化学研究所
出版者: ELSEVIER
出版地: NEW YORK
中文摘要: 建立了在线测定秦皮甲素和秦皮乙素水解反应速率常数的扫集-流动注射-胶束电动色谱新方法。该方法进样频率为12次/h,可在5min内完全分离反应体系中的所有组分,30min即可完成一个温度下的反应速率常数测定。由于该在线测定方法不需要终止水解反应,通过一次连续进样分析得到水解反应过程电泳谱图,从而可以获得水解反应过程中的一些信息。在最佳条件时,用0.1mol/LKOH为催化剂,测得25,30,35,40和45℃时秦皮甲素的水解反应速率常数分别为3.65×10~(-2)/min、5.24×10~(-2)/min、7.12×10~(-2)/min、10.5×10~(-2)/min和16.3×10~(-2)/min,活化能为58.57kJ/mol。用10mmol/LKOH为催化剂,测得15,20,25,30和35℃时秦皮乙素的水解反应速率常数分别为2.26×10~(-2)/min,2.85×10~(-2)/min,3.55×10~(-2)/min,4.38×10~(-2)/min和5.29×10~(-2)/min,活化能为31.55kJ/mol。
英文摘要: Aesculin and aesculetin hydrolysis were studied on-line using sweeping-flow injection-chip micellar electrokinetic chromatography (Sweeping-FI-chip MEKC). With this method, all the analytes in the sample are well separated within 5 min, and a sampling rate of 12 per hour is achieved. At this sampling frequency, a rate constant can be obtained within 30 min. In contrast to off-line methods, it was quite time. saving. And the aesculin hydrolysis mixture solution is directly injected and analyzed without quenching the reaction, thus the information of the hydrolysis process can be obtained from the electrophorogram of a sequence injection. Under the optimum conditions, the hydrolysis rate constants for aesculin at 25, 30, 35, 40 and 45 degrees C using 0. 1 mol/L KOH as hydrolyte are obtained as 3. 65 x 10(-2) /min, 5. 24 x 10(-2) /min, 7. 12 x 10(-2) /min, 10. 5 x 10(-2) /min and 16. 3 x 10(-2) /min, respectively. The activation energy for aesculin hydrolysis is 58. 57 kJ/mol. The hydrolysis rate constants for aesculetin at 15, 20, 25, 30 and 35. using 10 mmol/L KOH as hydrolyte are obtained as 2. 26 x 10(-2) /min, 2. 85 x 10(-2) /min, 3. 55 x 10(-2) /min, 4. 38 x 10(-2) /min and 5. 29 x 10(-2) /min, respectively. The activation energy for aesculin hydrolysis is 31. 55 kJ/mol.
关键词: Sweeping-flow injection-chip micellar electrokinetic chromatography ; On-line hydrolysis ; Aesculin ; Aesculetin ; Rate constant
作者部门: [Zhu Hua-Dong ; Chen Yong-Lei ; Chen Hong-Li ; Chen Xing-Guo] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
通讯作者: Chen, XG (reprint author), Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China.
学科分类: Chemistry
文章类型: Article
所属项目编号: National Natural Science Foundation of China [21375053]
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 中文
DOI: 10.11895/j.issn.0253.3820.160142
ISSN号: 0253-3820
WOS记录号: WOS:000378353500007
CSCD记录号: CSCD:5679015
IR记录号: WOS:000378353500007
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/180402
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Zhu, HD,Chen, YL,Chen, HL,et al. On-line Study of Aesculin and Aesculetin Hydrolysis Using Sweeping-Flow Injection-chip Micellar Electrokinetic Chromatography[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2016,44(4):597-603.
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