Volume 27, Number 1, January/February 1999Importance de la lipophilie en modélisation moléculaire
|Page(s)||57 - 60|
Flow injection potentiometric determination of Fe(III) using a fluoride-selective electrode as detectorM. Bralic and N. Radic
Department of Chemistry and Environmental Chemistry, Faculty of Chemical Technology, University of Split, 21000 Split, Croatia
Flow injection analysis (FIA) system incorporating a fluoride ion-selective electrode (FISE) as detector is described. Laboratory-built cascade flow cell equipped with FISE and reference electrode is used for flow injection potentiometric determination of Fe(III) based on monitoring of the formation of FeF2+ in acid solution. Under optimized flow conditions (4.0 mL min-1, 300 samples, 10-5 mol L-1 sodium fluoride in the carrier stream) a rectilinear calibration graph is obtained by plotting the peak height versus concentration of iron in the range of Fe(III) concentration from to mol L-1 in a 0.01 mol L-1 perchloric acid or acetate buffers (pH 2.8; 3.4).
Key words: Flow-injection analysis / iron(III) / fluoride ion-selective electrode.
© EDP Sciences, Wiley-VCH 1999