Abstract
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. An automatic titration method is reported to resolve ternary mixtures of transition metals (Pb<sup>2+</sup>, Cd<sup>2+</sup> and Cu<sup>2+</sup>) employing electronic tongue detection and a reduced number of pre-defined additions of EDTA titrant. Sensors used were PVC membrane selective electrodes with generic response to heavy-metals, plus an artificial neural network response model. Detection limits obtained were ca. 1 mg L<sup>-1</sup> for the three target ions and reproducibilities 3.0% for Pb<sup>2+</sup>, 4.1% for Cd<sup>2+</sup> and 5.2% for Cu<sup>2+</sup>. The system was applied to contaminated soil samples and high accuracy was obtained for the determination of Pb<sup>2+</sup>. In the determination Cd<sup>2+</sup> and Cu<sup>2+</sup>, sample matrix showed a significant effect.
Original language | English |
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Pages (from-to) | 336-342 |
Journal | Electroanalysis |
Volume | 27 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jan 2015 |
Keywords
- Artificial neural networks
- Electronic tongue
- Ion selective electrodes
- Sensor array
- Simultaneous titration
- Transition metals