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Updated: Aug 22, 2026

Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
Determination of chlorite in drinking water by differential pulse voltammetry on graphite
Giovanni Pezzatini1, Ilaria Midili, Gabriele Toti
1Dipartimento di Chimica, Università di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy. giop@unifi.it
Abstract:
The chlorite ion is an unavoidable by-product of the disinfection of drinking water by means of chlorine dioxide. The maximum concentration values of chlorite accepted in many countries' regulations range from 0.2 to 1.0 mg L(-1). A simple, inexpensive and quickly set up voltammetric procedure for the on-site determination of chlorite in drinking water networks is described. This procedure is suitable for the whole range of applications in drinking water plants. A useful cell for on-field analysis has been developed. Surface morphology and behaviour of carbon-based working electrodes have been investigated by voltammetry and atomic force microscopy (AFM). Actual samples of different types of water networks have been analysed for chlorite concentration.
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