Fig. 2. Oxygen concentration in PtOEP toluene solution at different flow rates and degassing unit vacuum pressure. The inset shows the minimum O2 concentration versus vacuum pressure for a 300 μl min−1 flow rate and a linear fit of the data points. PFA tubing of 10 cm length, 0.04′′ internal diameter and 1/16′′ external diameter was used between the degassing unit and the measurement cell.
