A selective modified carbon paste electrode for determination of cyanide using tetra-3,4-pyridinoporphyrazinatocobalt(II) |
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Authors: | Abbaspour A Asadi M Ghaffarinejad A Safaei E |
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Institution: | Department of Chemistry, Shiraz University, Shiraz 71454, Iran |
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Abstract: | 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 1.5 × 10−5 M and 1.0 × 10−2 M with a Nernstian slope of 60 ± 1.5 mV/decade and its detection limit is 9 × 10−6 M. The response time of electrode is 5 min. 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. |
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Keywords: | Carbon paste electrode Cyanide Potentiometry Co(3 4 tppa) |
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