Voltammetric Determination of Iron(III) in Water

Un electrodo serografiado y un electrodo de grafito pirolítico de borde plano sin modificar fueron utilizados en una voltamperometría de onda cuadrada para determinar cantidades traza de Fe(III) en muestras reales de agua de botella mineral.

A square wave voltammetric procedure for the detn. of trace amts. of Fe(III) was developed at an unmodified edge plane pyrolytic graphite (EPPG) electrode and a screen printed electrode (SPE).  This simple procedure was applied to real samples of com. bottled mineral water.  Sensitive results in the micromolar region could be achieved without modification of the electrode.  Using the WHO guideline limits for the Fe(III) concn. in drinking water, recovery percentages at an EPPG gave 103 % and 107 %, and 98.6 % and 95.0 % at a SPE for the 5.36 μM (0.3 mg L^-1) and 53.6 μM (3.0 mg L^-1) addns. of Fe(III), resp.

• Lu, Min; Compton, Richard G.
• Electroanalysis, Ahead of Print