(a) Typical temporal profile of conductivity signals (50 μM H2SO4) which
decrease due to 5–100 mM NHþ
4 . 4 M NaOH and N2 flow rate 200 ml/min were
employed to convert NHþ
4 =NH3. (b) Relationship of subtracted rate of decreasing of
conductivity and ln(TLC-20) vs NHþ
4 concentration.