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The Effect of Column Internal Diameter for Robust Size Exclusion Chromatography
September 3rd 2021The use of sub-2 µm particles for SEC have expanded analytical method for the characterization of biologics. This is especially noteworthy with monoclonal antibodies (mAbs), wherein methods developed on ultra high-performance SEC (UHP-SEC) columns can separate not only aggregates, but also fragment. This application note explores the effect of column internal diameter for robust size exclusion chromatography methods.
Improving Resolution for Size-Exclusion Chromatography Methods by Optimization
September 3rd 2021Flow rate is a common method parameter for most adsorptive LC methods. However, SEC is unique in that lower flow rates often yield improvements in separation, and resolution can improve considerably simply by running at a lower linear velocity. This application note demonstrates this approach for the aggregate analysis of NIST mAb, a common standard protein.
Optimizing Phosphate Concentration for Size-Exclusion Chromatography
September 3rd 2021Assessing phosphate concentration may be necessary to ensure that no differences are observed with modulating concentration. This ensures proper sample recovery and demonstrates robustness of the method. In this application note, we review SEC chromatographic performance for trastuzumab and NIST mAb modulating concentration of potassium phosphate.
Organic Solvent in Size Exclusion Chromatography of an Antibody Drug
September 3rd 2021In this application note, we demonstrate the effect of organic solvent on SEC analysis of an ADC “mimic.” This sample is a monoclonal antibody that has been conjugated to a dansyl group and functions as a surrogate for the typically cytotoxic agent commonly used for most ADC modalities.