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Ti metal electrode as an unconventional amperometric sensor for determination of Au(III) species

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Abstract

The control of the noble metal concentration is crucial in order to increase the efficiency of hydrometallurgic processes in mining and in the recovery of precious materials from electronic waste. The present study is devoted to the development of an effective procedure for the quantification of Au(III) species dissolved in aqueous solutions, similar real complex matrices included. In particular, a novel electrode system based on Ti has been studied. This electrode material is still poorly investigated in the framework of electroanalysis, despite its lack of sensitivity to common interfering species, such as oxygen; hence, the determination of metal species can be carried out without performing deaeration of the solution. In addition, the interfering effect due to the presence of other heavy metal ions, such as Ag, Fe and Pb, has been minimised by a proper choice of the conditions adopted for the amperometric measurements. Ti electrodes exhibit reproducible electrochemical responses, even in the presence of high concentration of organic fouling species typical of biosorption processes.

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Correspondence to Renato Seeber.

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Published in the topical collection celebrating ABCs 13th Anniversary.

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Terzi, F., Zanfrognini, B., Ruggeri, S. et al. Ti metal electrode as an unconventional amperometric sensor for determination of Au(III) species. Anal Bioanal Chem 407, 983–990 (2015). https://doi.org/10.1007/s00216-014-8259-9

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  • DOI: https://doi.org/10.1007/s00216-014-8259-9

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