Cyclam Modified Carbon Paste Electrode as a Potentiometric Sensor For Determination of Cobalt(Ⅱ) Ions

Abstract

Abstract: A new modified carbon paste electrode based on cyclam as a modifier was prepared for the determination of Co(Ⅱ) ions.The proposed electrode shows a Nernstian slope 28.4 mV per decade over a wide concentration range 5.0×10^-6_1.0×10^-1 mol/L of CO²⁺ ions with detection limit 2.5×10^-6 mol/L.The sensor exhibits good selectivities for CO²⁺ over a wide variety of other cations.It can be used as an indicator electrode in potentiometric titration of cobalt(Ⅱ) ions as well as in direct determination of cobalt(Ⅱ) ions in wastewater of acidic cobalt electroplating bath.The electrode shows Nernestian behavior in a solution of 25% ethanol.

Key words: Carbon paste electrode, Cyclam, Potentiometry, Cobalt

Hamid Reza POURETEDAL, Mohammad Hossein KESHAVARZ. Cyclam Modified Carbon Paste Electrode as a Potentiometric Sensor For Determination of Cobalt(Ⅱ) Ions[J]. Chemical Research in Chinese Universities, 2005, 21(1): 28-31.

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Cyclam Modified Carbon Paste Electrode as a Potentiometric Sensor For Determination of Cobalt(Ⅱ) Ions

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