Cobalt phthalocyanine derivatives as neutral carriers for nitrite-sensitive poly(vinyl chloride) membrane electrodes
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 119 (6) , 1363-1366
- https://doi.org/10.1039/an9941901363
Abstract
PVC membrane electrodes based on cobalt phthalocyanine and its derivatives are described. An electrode that exhibits the selectivity sequence NO2 – > SCN–≈ I–≫ CIO4 – > Br– > NO3 – > Cl– > OAc– was prepared. The electrodes show a linear response towards nitrite in the range 6 × 10–2–5 × 10–6 mol dm–3 with a slope of –52.0 mV decade–1(at 20 °C). The electrode has a satisfactory reproducibility and a rapid potential response. The UV spectra of the carrier and the a.c. impedance of the membrane were studied.Keywords
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