Online MALS-QELS (Quasi-Elastic Light Scattering)

This application note describes how online multi-angle light scattering (MALS) can be made even more versatile with the addition of a quasi- elastic light scattering (QELS, a.k.a. dynamic light scattering) module for determination of hydrodynamic radius. The application note explains how QELS can be added to a Wyatt MALS system either as a module or by connection via optical fiber. The MALS-QELS combination allows the simultaneous determination of absolute molar mass, root-mean-square radius and hydrodynamic radius.