Effect of N2 gas flow rate to the subtracted rate of decreasing of conductivity
of 50 μM H2SO4 at Pt electrode: (a) RDC vs NHþ
4 5–100 mM with using N2 flow rate
100, 200 and 500 mL/min, (b) RDC vs N2 Flow rate of various sets of solution in GCU
(DI water, 0.1 M H2SO4þDI water, 0.1 M H2SO4þ4 M NaOH, 5 mM NHþ
4 in 0.1 M
H2SO4
þ 4 M NaOH, 0.1 M H2SO4þ1 M NaClþ4 M NaOH)