Abstract
A new PVC membrane electrode for cobalt(II) ions based on a recently synthesized Schiff base of 5-((4-nitrophenyl)azo)-N-(2′,4′-dimethoxyphenyl)salicylaldimine is reported. The electrode exhibits a Nernstian response for Co2+ ions over a wide concentration range (9.0×10−7–1.0×10−2 M) with a slope of 29(±1). The limit of detection is 8.0×10−7 M. The proposed sensor revealed good selectivities over a wide variety of other cations including hard and soft metals. This electrode could be used in a pH range of 3.5–6.0. It was used as an indicator electrode in potentiometric titrations of cobalt(II) ions and can be used in the direct determination of Co2+ in aqueous solutions.
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Mashhadizadeh, M.H., Sheikhshoaie, I. Co2+-selective membrane electrode based on the Schiff Base NADS. Anal Bioanal Chem 375, 708–712 (2003). https://doi.org/10.1007/s00216-002-1744-6
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DOI: https://doi.org/10.1007/s00216-002-1744-6