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In this work, a C 18  reversed-phase column with nonporous polymeric 2.5-µm particles is utilized to initially test the analysis of oxidized and deamidated human growth hormone (hGH). Phosphate buffer (pH 7.5) with 24% 1-propanol was used for elution. This quick method (analysis time is 20 min) gave a selectivity, as judged by the number of detected peaks, and resolution of hGH variants that is better than many methods in which porous silica particle columns are used. Only mixtures of oxidized and deamidated hGH are analyzed, and no characterization of the peaks is performed. The results indicate that C 18  nonporous polymeric column material is a promising alternative for the chromatographic separation of several hGH variants.

journal of chromatographic science

Usage of Nonporous Polymeric Particles for Reversed-Phase High-Performance Liquid Chromatography of Oxidized and Deamidated Forms of Recombinant Human Growth Hormone