Naslov
Flow injection potentiometric determination of Fe(III) using a fluoride-selective electrode as detector

Autori
Bralić, Marija ; Radić, Njegomir

Izvornik
Analusis (0365-4877) 27 (1999); 57-60

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Flow-injection analysis; iron(III); fluoride ion-selective electrode

Sažetak
Flow injection analysis (FIA) system incorporating a fluoride ion-selective electrode (FISE) as detector is described. Laboratory-build 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 mL 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 1× 10-4 to 1× 10-1 mol L-1 in a 0.01 mol L-1 perchloric acid or acetate buffers (pH 2.8; 3.4).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA