A flow-injection electronic tongue based on potentiometric sensors for the determination of nitrate in the presence of chloride

Jordi Gallardo, Salvador Alegert, Manuel Del Valle

Research output: Contribution to journalArticleResearchpeer-review

61 Citations (Scopus)

Abstract

This communication shows a novel strategy in the field of potentiometric sensors, applied to the determination of nitrate in the presence of chloride interferent. The determination is performed employing the flow-injection analysis technique with four potentiometric sensors featuring cross-term response. The signal processing with a multivariate data treatment, in this case an artificial neural network based on the Bayesian regularization, lets us quantify the concentration of nitrate ion between 0.1 and 100mgl -1NO3- without the need to eliminate chloride interferent. Results obtained with this approach are compared with the direct determination of nitrate using its ion-selective electrode, showing how the new strategy attains a better correlation of obtained versus expected values, especially at the lower concentration levels. The comparison line between these pairs yields an intercept of 0.0 ± 0.3mgl-1NO3- and a slope of 1.01 ± 0.02. © 2004 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)72-80
JournalSensors and Actuators, B: Chemical
Volume101
Issue number1-2
DOIs
Publication statusPublished - 15 Jun 2004

Keywords

  • Chloride
  • Electronic tongue
  • Ion-selective electrode array
  • Neural networks
  • Nitrate

Fingerprint Dive into the research topics of 'A flow-injection electronic tongue based on potentiometric sensors for the determination of nitrate in the presence of chloride'. Together they form a unique fingerprint.

  • Cite this