Inline Size Exclusion Chromatography (SEC) is now available at BioSAXS beamline G1 for select polydisperse systems that are otherwise difficult to analyze using a traditional BioSAXS setup. In the inline SEC-SAXS configuration, SEC eluates from our GE HPLC (ÄKTApurifier) are routed directly and continuously into a BioSAXS flow cell for subsequent X-ray interrogation.