Modern analytical challenges require more than identifying molecular composition. They require insight into structural organization, population distributions, and changes over time. Protein therapeutics, lipid nanoparticles, supramolecular assemblies, food colloids, and environmental particles exist as heterogeneous populations, where function, stability, and risk depend on size, aggregation state, interactions, and structure.

This is where Field-Flow Fractionation, particularly AF4, is essential. By separating fragile systems in an open channel without a stationary phase, FFF enables size-resolved analysis while better preserving native structure and interactions. Coupled with multi-detection, it connects size, molar mass, composition, and structure in one workflow, measuring complex systems at the level where their behaviour is determined.

The Dutch FFF Facility & Expertise Hub provides access to this capability through instrumentation, method development, data interpretation, and collaborative research, supporting both academic and industrial partners.