News|Articles|January 21, 2026

Efficient Method Development for Separation of Antibody Charge Variants by Ion-Exchange Chromatography

This article describes how to efficiently achieve the optimal peak separation for charge variants of a monoclonal antibody using pH gradient ion-exchange chromatography and LabSolutions MD, dedicated software that can automate the entire method development workflow, including the generation of an analysis schedule, mobile phase preparation, and data processing.


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Figure 2. Split injection used to measure triplicate test of MTBE, hexane, o-xylene, and 1-methylnaphthalene comparing different solvents (methanol, methylene chloride) and column insertion distances starting with 0.5 mm, 5.0 mm, 10.0 mm, 15 mm, and 20.0 mm. Methanol had the best performance at the 5.0 mm insertion distance and methylene chloride looked slightly better at the 0.5 mm. We would still recommend not going below the 5.0 mm manufacturer recommended insertion distance.
Revisiting insertion distance for methanol and methylene chloride in GC analysis and confirming that insertion depth strongly affects response and reproducibility.
Basel, Switzerland. Old town with red stone Munster cathedral on the Rhine river. © SCStock - stock.adobe.com
SFC Europe 2026 brings global experts to Basel for courses, scientific talks, workshops, and insights into greener separation technologies.
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