Am. Yu et al., FLOW-INJECTION ANALYSIS OF ASCORBIC-ACID AT A METHYLENE GREEN CHEMICALLY-MODIFIED ELECTRODE, Fresenius' journal of analytical chemistry, 357(1), 1997, pp. 84-85
In flow injection analysis (FIA) of ascorbic acid, methylene green (MG
) modified carbon paste electrodes showed high catalytic activity and
stability, reducing the oxidation overpotential by 400 mV. The linear
response range was over 3 orders of magnitude and the detection limit
was 1 x 10(-8) mol/L eq. 0.25 pmol with S/N = 3. The influence of vari
ous experimental conditions was explored for optimum analytical perfor
mance.