期刊
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
卷 53, 期 3, 页码 371-375出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpba.2010.04.021
关键词
Chromatographic artifacts; Control of chromatographic artifact peaks; Copper chelating complex; EDTA rinse
Two unusual chromatographic artifact peaks were detected in the HPLC analysis for content of a malonohydrazide derivative drug and drug-related impurities The artifacts were identified as the copper(II) chelating complexes with the drug compound and one of the process impurities Our investigations suggested that built-up of Cu2+ contamination in the HPLC system was the primary source for formation of the chelating artifacts. A rinse procedure using diluted EDTA solution was developed, and demonstrated to effectively purge trace level of heavy metals including Cu2+ from the system, and therefore inhibited the formation of both chelates. Furthermore, the rinse was shown to introduce no detrimental impact on the response accuracy of the active drug compound and related impurities (C) 2010 Elsevier B V All rights reserved
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