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By using linear sweep voltammetry and chronoamperometry at a rotating disc electrode it was found that sodium dithionite can be oxidised at several electrode materials. At platinum, palladium, glassy carbon and gold an oxidation reaction was observed that showed promising characteristics for analytical purposes and sensor development. The limiting current signal at a potential of +0.3 V vs. SSE is proportional to the concentration of sodium dithionite, the electrode reacts almost immediately on a change of concentration of sodium dithionite and experimental proof is given that the electrode is stable for at least 3 days without recalibration. The electrode can be calibrated by a one point calibration because the calibration curve is linear and goes through the origin.

Possibilities to measure the concentration of sodium dithionite in textile applications by means of amperometric sensors