We used the ideal PFR model where there is a steady flow (Qin = Qout = 0.2 mLmin -1 ) with no diffusion or dispersion across the boundaries. In Phase 1, the net input by advection was based on the system's response to a "step" input, where a constant input concentration (C0 = 0.3 mM) was maintained over a period of time. In Phase 2, the system was evaluated with a "pulse" input, where no input concentration (C0 = 0 mM) was applied, and the effluent concentration gradually decreased to zero according to the system's residence time distribution (τ). τ measured using a Br -tracer test, was estimated at ≈2.45 min for the used microfluidic chamber (Figure , SI).