A copper-selective electrode based on bis(acetylacetone)propylenediimine

• Published in: Talanta (Oxford) Vol. 68; no. 2; pp. 193 - 197
• Main Authors: Gupta, V.K., Goyal, R.N., Bachheti, N., Singh, L.P., Agarwal, S.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.12.2005; Oxford Elsevier
• Subjects: Analytical chemistry; Bis(acetylacetone)propylenediimine; Chemistry; Copper; Electrochemical methods; Exact sciences and technology; General, instrumentation; Ion-selective electrodes; Ion-selective electrodes; Copper; Bis(acetylacetone)propylenediimine; Trace analysis; Membrane electrode; TBP; Interference; Selectivity; Chemical sensor; EDTA; Potentiometry; Ion selective electrode; Acetylacetone; Copper ion; Detection limit; Sodium borates; Polyvinyl chloride; Butyl phosphates; Electrochemical titration
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2005.06.050

The potentiometric response characteristics of Cu 2+-selective electrodes based on bis(acetylacetone)propylenediimine ( I) combined with anion localizing agent (sodium tetraphenyl borate (NaTPB)) and solvent mediators (dibutyl butyl phosphonate (DBBP), tri- n-butyl phosphate (TBP) and chloronaphthalene (CN)) were investigated. The best results for Cu 2+ sensing was obtained for the electrode membrane containing PVC, I, DBBP and NaTPB in composition 5:100:200:6 ( I:PVC:DBBP:NaTPB) (w/w; mg), where the electrode had a Nernstian response (30.0 mV/decade) to Cu 2+ within the concentration range 1.0 × 10 −5 to 1.0 × 10 −1 M and detection limit of 0.5 ppm. The operational pH range of the electrode was 3.3–7.0. Selectivity characteristic of the proposed electrode was also assessed by calculating K A , B Pot using fixed interference method matched potential method. The sensor has been successfully used in the potentiometric titration of copper ions with EDTA.