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Potentiometric pH sensor with anthraquinonesulfonate adsorbed on glassy carbon electrodes

1996; Wiley; Volume: 8; Issue: 12 Linguagem: Inglês

10.1002/elan.1140081217

1521-4109

Kwok‐Keung Shiu, Fayi Song, Hong‐Ping Dai,

Electrochemical sensors and biosensors

Abstract Electrochemically activated glassy carbon electrodes adsorbed with anthraquinonesulfonate species showed potentiometric responses toward pH changes for pH range between 1 and 11, with a near Nernstian slope of about 56.4 mV/pH and a lifetime of more than one month. The effects of electrode pretreatment and preparation conditions, as well as the effects of interfering ions on the electrode response were studied.