Figure (top) illustrates the CO2 release volume calculated both from sensor measurements and the oxidation voltage signature of the adduct for experiments done in Figure and 3b (see Figure ). The volume obtained from the sensor includes the combined contribution of nucleophilicity-swing and pHswing mechanisms, while the CO2 volume determined by deducing the adduct concentration from the halfcell discharge voltages represents solely the contribution of the adduct. As a result, the disparity between these two values is attributed to the pH-swing mechanism. In Figure , we've also presented the maximum theoretical CO2 that can be anticipated from this system based on the total discharge capacity. The total theoretical CO2 capacity, based on discharge capacities, is within the same range across all the experiments. This consistency is observed given that, in all tests, 12 ml of 0.1 M 1,5-BTMAP AQ was prepared. Furthermore, as anticipated, an increase in the duration of the CO2 purge time leads to a proportional rise in the total captured amount measured by the sensor. Interestingly, the contribution of the pH-swing mechanism versus the nucleophilicity-swing mechanism changes across these experiments. In Figure (bottom), the percentage contribution of each mechanism to the total capture amount is presented. For the short 15-minute duration tests, we observe a 40% contribution from the pH-swing mechanism. However, with a prolonged 7-hour purge time, the capture predominantly occurs through the nucleophilicity mechanism. This observation aligns very well with our earlier discussions on the thermodynamic and kinetic predictions for the BTMAPAQ isomers, demonstrating slow kinetics of nucleophilicity-swing mechanism compared to the pH-swing mechanism but eventual equilibrium domination of the nucleophilicity-swing mechanism. Subsequently, our attention turned to conducting tests at high concentrations of 0.4 M and very diluted CO2 concentrations of 0.01 (1% CO2, 99% N2) (See Figure ). At these high AQ concentrations, the salinity of the solution deviates from the assumptions made in our modeling scheme. Furthermore, owing to the extremely low concentrations of CO2, extended purge durations are necessary to achieve high capture capacities. Figure illustrates the measurements conducted over different durations of purge time (1 -10 hours). In these experiments at high concentration of BTMAPAQ, we observe the dominance of the nucleophilicity-swing mechanism in all tests. Experiments shown in Figure suggests a potential exchange reaction between the organic carbonate adduct and inorganic carbonate, drawing parallels to the reported self-exchange electron-transfer reactions observed between diamagnetic and paramagnetic ions of anthraquinones . In the present paper, our primary focus is on introducing in situ methods for quantification of these phenomena. However, the observed potential exchange reaction between the organic carbonate adducts and inorganic carbonate is intriguing and warrants further investigation.