{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,21]],"date-time":"2026-01-21T18:29:07Z","timestamp":1769020147515,"version":"3.49.0"},"reference-count":33,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2018,1,13]],"date-time":"2018-01-13T00:00:00Z","timestamp":1515801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010198","name":"MINECO","doi-asserted-by":"publisher","award":["CTQ2013-41577-P"],"award-info":[{"award-number":["CTQ2013-41577-P"]}],"id":[{"id":"10.13039\/501100010198","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100010198","name":"MINECO","doi-asserted-by":"publisher","award":["CTQ2016-80170-P"],"award-info":[{"award-number":["CTQ2016-80170-P"]}],"id":[{"id":"10.13039\/501100010198","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003741","name":"ICREA","doi-asserted-by":"publisher","award":["ICREA Academia"],"award-info":[{"award-number":["ICREA Academia"]}],"id":[{"id":"10.13039\/501100003741","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work reports the applicability of a voltammetric sensor array able to quantify the content of 2,4-dinitrophenol, 4-nitrophenol, and picric acid in artificial samples using the electronic tongue (ET) principles. The ET is based on cyclic voltammetry signals, obtained from an array of metal disk electrodes and a graphite epoxy composite electrode, compressed using discrete wavelet transform with chemometric tools such as artificial neural networks (ANNs). ANNs were employed to build the quantitative prediction model. In this manner, a set of standards based on a full factorial design, ranging from 0 to 300 mg\u00b7L\u22121, was prepared to build the model; afterward, the model was validated with a completely independent set of standards. The model successfully predicted the concentration of the three considered phenols with a normalized root mean square error of 0.030 and 0.076 for the training and test subsets, respectively, and r \u2265 0.948.<\/jats:p>","DOI":"10.3390\/s18010216","type":"journal-article","created":{"date-parts":[[2018,1,15]],"date-time":"2018-01-15T12:30:36Z","timestamp":1516019436000},"page":"216","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["A Voltammetric Electronic Tongue for the Resolution of Ternary Nitrophenol Mixtures"],"prefix":"10.3390","volume":"18","author":[{"given":"Andreu","family":"Gonz\u00e1lez-Calabuig","sequence":"first","affiliation":[{"name":"Sensors and Biosensors Group, Department of Chemistry, Universitat Aut\u00f2noma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xavier","family":"Cet\u00f3","sequence":"additional","affiliation":[{"name":"Future Industries Institute, University of South Australia, SA 5095 Adelaide, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1032-8611","authenticated-orcid":false,"given":"Manel","family":"Del Valle","sequence":"additional","affiliation":[{"name":"Sensors and Biosensors Group, Department of Chemistry, Universitat Aut\u00f2noma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,1,13]]},"reference":[{"key":"ref_1","unstructured":"US Environmental Protection Agency (1980). 4-Nitrophenol, Health and Environmental Effects Profile No. 135."},{"key":"ref_2","unstructured":"Council of the European Union (1976). 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