The same set-up can be used to report electrochemistry below the detection limit of an electrochemical workstation. In this work, this was demonstrated by repeating electrochemistry of FcMeOH in the detection cell, but with a more diluted solution. This approach decreases the faradaic current below the charging current, making it effectively invisible with cyclic voltammetry. Voltammetry of the diluted FcMeOH solution, shown in Figure , gave no visible faradaic current. This is due to the expected limiting current for FcMeOH oxidation, which in these conditions was ≈ 2.5 pA, being smaller in magnitude than the capacitive current of the electrode. An increase in the fluorescence is observed during the voltammetry, which could be due to a number of different processes (both faradaic and non-faradaic) including: background faradaic processes of trace impurities, electrochemical noise, double layer charging, and electron transfer from the diluted FcMeOH. The fluorescent signal observed in Figure is a result of all of these processes. To extract the precise contribution of the faradaic processes, it would be necessary to subtract a background intensity profile (recorded in only electrolyte)