Conventional ultraviolet–visible spectroscopy (UV-vis) instruments use fixed optical pathlengths to measure analyte concentrations in biological samples. As Paul Mania (bioanalytics application specialist at Repligen) pointed out during an April 2022 presentation, such an approach requires sample dilution, which introduces risks for error and increases operator workload. Mania explained how the CTech SoloVPE instrument measures analyte concentrations at line without need for dilution, simplifying and accelerating analysis of samples from several downstream operations. Mania’s Presentation Traditional UV-vis instruments measure analyte absorbance…