A selective modified carbon paste electrode for determination of cyanide using tetra-3,4-pyridinoporphyrazinatocobalt(II).
A chemically modified carbon paste electrode with 3,4-tetra pyridinoporphirazinatocobalt(II) (Co(3,4 tppa) was applied to the determination of free cyanide ion. The electrode has a linear range between 1.5x10(-5)M and 1.0x10(-2)M with a Nernstian slope of 60+/-1.5mV/decade and its detection limit is 9x10(-6)M. The response time of electrode is 5min. The proposed electrode was applied successfully for the determination of cyanide in commercially available spring water. Some anions, such as SCN(-), I(-), Cl(-), Br(-) and oxalate that are usually serious interfering species for most of cyanide selective electrodes, did not have any interfering effect for this proposed electrode.
Abbaspour
A
A
Department of Chemistry, Shiraz University, Shiraz 71454, Iran.
Asadi
M
M
Ghaffarinejad
A
A
Safaei
E
E