Determination of chlorite in drinking water by differential pulse voltammetry on graphite.
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.
Pezzatini
Giovanni
G
Dipartimento di Chimica, Università di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy. giop@unifi.it
Midili
Ilaria
I
Toti
Gabriele
G
Loglio
Francesca
F
Innocenti
Massimo
M
D002712:Chlorides / Q000032:analysis* / Q000737:chemistry*; D002852:Chromatography, Ion Exchange; D004563:Electrochemistry / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D007091:Image Processing, Computer-Assisted; D018625:Microscopy, Atomic Force; D014881:Water Supply / Q000032:analysis* / Q000592:standards
D002712:Chlorides; D006108:Graphite; C001599:chlorite