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levamlodipine amlodipine

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https://www.readbyqxmd.com/read/26166294/an-approach-to-the-determination-of-the-enantiomeric-excess-at-the-extreme-case-by-capillary-electrophoresis
#1
Hongting Xiao, Xia Fu, Shuang Liang, Youxin Li, James J Bao, Yong Zhang
Capillary electrophoresis (CE) has been applied to determine the percentage of enantiomeric excess (ee%) of chiral compounds. In such assays, the quality of chiral selectors (CSs) plays vital roles in resolving the enantiomers for accurate determination of the ee%. Selecting an efficient CS is usually by trial and error, and is, if ever possible, time-consuming and costly. Here we propose a new approach by using the velocity gap mode of CE (VGCE) method, to simplify the method development process for ee% determination...
August 21, 2015: Journal of Chromatography. A
https://www.readbyqxmd.com/read/25269770/determination-of-enantiomeric-impurity-of-levamlodipine-besylate-bulk-drug-by-capillary-electrophoresis-using-carboxymethyl-%C3%AE-cyclodextrin
#2
Yuedong Qi, Xiaojian Zhang
A rapid capillary electrophoresis method using carboxymethyl-β-cyclodextrin (CM-β-CD) as chiral selector was developed and validated for the enantiomeric purity determination of levamlodipine besylate bulk drug. Several parameters for were optimized for a satisfactory enantioresolution, including pH of background electrolyte, the concentration of chiral selector, buffer concentration, capillary temperature and voltage. The highest resolution (Rs = 9.8) was obtained with 4 mM CM-β-CD dissolved in 40 mM phosphate buffer (pH 3...
December 2014: Cell Biochemistry and Biophysics
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