Analytical Method Development for Synthetic Peptide Purity

This case study presents an analytical method development for assessing the purity and impurities content of synthetic peptides using Ultra-High-Performance Liquid Chromatography (UHPLC). It outlines the challenges faced during the development process and details Almac's systematic approach to creating a stability-indicating UHPLC purity method. The study emphasizes the importance of defining an Analytical Target Profile (ATP) based on regulatory requirements to ensure the method's suitability. It describes the systematic screening preparation, including the selection of diluents and initial screening conditions, which are crucial for optimizing the method. The case study also discusses the initial method optimization phase, where various chromatographic conditions are evaluated to enhance resolution of degradation impurities. The final method conditions selected for evaluation of peak purity are presented, alongside the assessment of impurities detected during analysis. Overall, the case study illustrates the complexities involved in developing robust analytical methods for synthetic peptides.