Journal
ELECTROANALYSIS
Volume 17, Issue 24, Pages 2260-2265Publisher
WILEY-BLACKWELL
DOI: 10.1002/elan.200503356
Keywords
potentiometry; copper sensor; PVC membrane; 6-methyl-4-(1-phenylmethylidene)amino-3-thioxo-1,2,4triazin-5-one
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A new Cu(II) ion-selective PVC membrane sensor based on 6-methyl-4-(1-phenylmethylidene)amino-3-thioxo-1,2,4-triazin-5-one (MATTO) as an excellent sensing material was developed. The electrode exhibits a Nernstian slope of 29.2 +/- 0.4 mV per decade over a very wide concentration range between 1.0 x 10(-1) and 1.0 x 10(-6) M, with a detection limit of 4.8 x 10(-7) M (30.5 ng/mL). The sensor possesses the advantages of short conditioning time, fast response time (< 10 s), and especially, very good selectivity towards transition and heavy metal, and some mono, di and trivalent cations. The proposed electrode was successfully applied to the determination of copper in wastewater of copper electroplating samples and as an indicator electrode in potentiometric titration of Cu(II) ions with EDTA.
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