Determination of solute lipophilicity by reversed-phase high-performance liquid chromatography (RP-HPLC)

Determination and Validation of Eflornithine Hydrochloride by (Rp-Hplc) Reversed Phase High Performance Liquid Chromatography

A simple highly sensitive, rapid, precise, accurate and specific RP-HPLC method was developed for quantification of eflornithine hydrochloride (2-difluoromethyl-DL-ornithine; DFMO) in its commercial formulation. In this RP-HPLC method, the separation was performed using BDS Hypersil 5μ C18 (150 X 4.6 mm) column at room temperature by using methanol: 2% of Glacial acetic acid in water (80:20 v/v...

Reversed-phase high-performance liquid chromatography.

Reversed-phase High-performance Liquid Chromatography Study of Lipophilicity of Imidazo[2,1-f]theophylline Derivatives.

The present study is a part of our physicochemical and pharmacological studies in a group of tricyclic theophylline derivatives. The investigated compounds exhibit different pharmacological profiles in comparison to theophylline and have been tested as potential antidepressant and/or antipsychotic agents. The differences in pharmacological action between theophylline and their tricyclic derivat...

Separation of Somatropin and Its Degradation Products by High-Performance Liquid Chromatography Using a Reversed-Phase Polymeric Column

The accurate prediction of protein stability is one of the most challenging goals in protein formulation and delivery. In this study, a gradient RP-HPLC method is described for the separation of human growth hormone (hGH) variants as deamidated and oxidized forms. The methodology employed a polymeric poly (styrene-co-divinylbenzene) column and a 1mL/min flow rate of a linear gradient of 0.1% v/...

Determination of stereo- and positional isomers of oxygenated triterpenoids by reversed phase high performance liquid chromatography.

Twenty four oxygenated triterpenoids, including eight pairs of stereoisomers and five pairs of positional isomers, could be separated by reversed phase HPLC. The capacity factors obtained in methanol-water and acetonitrile-water solvent systems made it possible to correlate the molecular polarities due to the presence of multiple oxygenated functional groups in these compounds. It was found tha...