NDLI: Improved liquid chromatography combined with pulsed electrochemical detection for the analysis of etimicin sulfate.

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Improved liquid chromatography combined with pulsed electrochemical detection for the analysis of etimicin sulfate.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wu, Yuning Zhao, Wei Zhu, Xiaoyue Wang, Fang Zhang, Mei Fan, Xialei Yuan, Yaozuo Hu, Changqin Deng, Xiaolan Adams, Erwin
Description	Country affiliation: China Author Affiliation: Wu Y ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Zhao W ( China Pharmaceutical University, Nanjing, China.); Zhu X ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Wang F ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Zhang M ( China Pharmaceutical University, Nanjing, China.); Fan X ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Yuan Y ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Hu C ( Jiangsu Institute for Food and Drug Control, Nanjing, China.); Deng X ( National Institute for Food and Drug Control, Beijing, China.); Adams E ( Department of Pharmaceutical Analysis, School of Pharmacy, China Medical University, Shenyang, China.)
Abstract	This paper describes an improved liquid chromatography method combined with pulsed electrochemical detection for the analysis of etimicin sulfate. In total, 22 impurities could be separated. A TSK-GEL C18 column (250 mm × 4.6 mm i.d., 5 µm) is used, and the mobile phase is composed of 40 mL of acetonitrile and 960 mL of an aqueous solution containing trifluoroacetic acid (15 mL/L), pentafluoropropionic acid (500 µL/L), 50% sodium hydroxide (8 mL/L) and sodium sulfate (1.5 g/L). The pH of the aqueous solution is adjusted to 3.5 with 0.8 M sodium hydroxide. The influence of the different chromatographic parameters on the separation was investigated. A quadruple potential-time waveform was applied to the electrodes of the detection cell. 0.8 M sodium hydroxide was added post column to raise the pH to at least 12 before detection. A central composite experimental design was used to describe the relationship between factors and response values and to establish factorial analysis. Compared to previously published investigations, this improved method shows higher sensitivity, better separation ability and robustness and has been incorporated by the Chinese Pharmacopoeia 2015 for analysis of etimicin sulfate. A number of commercial samples of etimicin sulfate were also analyzed using this method.
File Format	HTM / HTML
ISSN	16159306
Issue Number	8
Journal	Journal of Separation Science
Volume Number	39
e-ISSN	16159314
Language	English
Publisher	Wiley-VCH
Publisher Date	2016-04-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Filtration and Separation

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