Abstract
An attempt has been made to develop a highly selective Cu2+-ion selective electrode based on a poly(vinyl chloride) based sensor using 1,2,5,6,8,11-hexaazacyclododeca-7,12-dione-2,4,8,10-tetraene as ionophore with 61.5% DBP in the presence of 29% PVC, 4.5% ionophore and 5% NaTBP as an anion excluder. The sensor exhibits a near Nernstian potential response of 29.5 ± 0.3 mV per decade over a wide concentration range (2.0 × 10-7 - 1 × 10-1 M) with a detection limit of 8.1 × 10-8 M between pH 3 - 11 with a fast response time of <5 s. The selectivity coefficient values, as determined by the matched potential method (MPM), indicate excellent selectivity for Cu(II) ions over a large number of ions. The proposed sensor exhibits an adequate shelf life (4 - 5 months) with good reproducibility. The quantification of Cu(II) in electroplating wastewater and various brands of Indian tea was successfully achieved using the proposed sensor.
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Chandra, S., Singh, C.K., Agarwal, H. et al. A Copper(II)-selective PVC Membrane Electrode Based on a Macrocyclic Ligand, 1,2,5,6,8,11-Hexaazacyclododeca-7,12-dione-2,4,8,10-tetraene. ANAL. SCI. 23, 683–687 (2007). https://doi.org/10.2116/analsci.23.683
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DOI: https://doi.org/10.2116/analsci.23.683