This work extends the concept of in situ electrochemical stripping sensors to environmentally important metals that are not readily accumulated by amalgamation. A renewable-reagent sensor has thus been designed to accommodate the complex formation and adsorptive accumulation steps of adsorptive stripping protocols. Such flow probe relies on the delivery of a ligand solution through a microdialysis sampling tube and transport of the resulting complex to a downstream adsorptive stripping detector. The integrated membrane sampling/adsorptive stripping sensor is characterized, optimized, and tested in connection with the monitoring of trace uranium and nickel using the propyl gallate and dimethylglyoxime chelating agents, respectively. Experimental variables, including the reagent delivery rate and ligand concentration, are explored. The microdialysis sampling step minimizes the interference of surface-active macromolecules and extends the linear dynamic range compared to conventional adsorptive stripping mea...