Ann Marie Rojahn

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Ann Marie Rojahn studied chemistry and biotechnology in combination with an apprenticeship as a chemical laboratory assistant at the University of Applied Sciences in Krefeld, Germany. After receiving a bachelor’s degree, she pursued a master’s programme in chemistry at the University of Düsseldorf, Germany, with a focus on organic chemistry. Since 2019, she has worked for YMC Europe in Dinslaken, Germany, as a product specialist in the analytical chromatography team.

Articles

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Solving Key Challenges in (Bio)pharmaceutical Analyses

Ann Marie Rojahn;Daniel Eßer

March 21st 2025

This article discusses several practical examples using bioinert columns, demonstrating their ability to deliver reliable, high-resolution results with precision and reproducibility.

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A Study on the Optimization of the Ion-Pair Reversed Phase Liquid Chromatography Analysis of Protected And Unprotected DNA Oligonucleotides

Ann Marie Rojahn;Mathias Hehn;Daniel Eßer

July 3rd 2024

This article describes a comprehensive study on optimizing ion-pair reversed-phase liquid chromatography for analysing protected and unprotected single-stranded DNA oligonucleotides.

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Native Anion Exchange Chromatography Coupled to Mass Spectrometry for the Charge Variant Analysis of IgG4-Based Monoclonal Antibodies

Ann Marie Rojahn;Daniel Eßer

March 6th 2024

The advantages of a native anion exchange method coupled to mass spectrometry for charge heterogeneity analysis of immunoglobulin G4 (IgG4)-based mAbs are described.