b4043e7d380d25889b69278c232ff2a5 chemosensors_a2021v9n3p46.pdf 83b06459af0db0fcfe174356a99e709dd2e80a1d chemosensors_a2021v9n3p46.pdf f1041ac86ee02f625bbdd6d35a13bc1c52071ec42d7e1bbdb0f45379f20c3cfd chemosensors_a2021v9n3p46.pdf Title: Determination of Chemical Oxygen Demand (COD) Using Nanoparticle-Modified Voltammetric Sensors and Electronic Tongue Principles Subject: This manuscript reports the use of nanoparticle-modified voltammetric sensors for the rapid and green determination of chemical oxygen demand in river waters and waters from agricultural waste. Four different variants of modified electrodes have been prepared: CuO nanoparticles electrogenerated over Cu and covered with Nafion film (CuO/Cu-Nf), and graphite–epoxy composites modified with Cu, CuO, and Cu–Ni alloy nanoparticles. The response features of these electrodes were assessed by calibrating them vs. glucose, glycine, ethyleneglycol, and hydrogenphtalate in alkaline media, as samples providing different difficulty in their (bio)degradation characteristics. The most sensitive electrode was demonstrated to be the (CuO/Cu-Nf) electrode, with an LOD of 12.3 mg O2L-1. The joint information provided by the sensor array showed the ability of estimating both the organic load and the type of sample in terms of difficulty of degradation, in what can be named an intelligent sensor assembly. Keywords: chemical oxygen demand; voltammetry; copper oxide electrode; copper nanoparticles electrode; copper oxide nanoparticles electrode; nickel copper alloy nanoparticles electrode; electronic tongue Author: Qing Wang and Manel del Valle Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Sat Feb 27 09:38:19 2021 CET ModDate: Sat Feb 27 09:49:35 2021 CET Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 14 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2679205 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- JWBPEQ+URWPalladioL-Ital Type 1 Custom yes yes no 10 0 UNQSEF+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 WQFQBS+URWPalladioL-Roma Type 1 Custom yes yes no 19 0 QAUHDF+CMSY10 Type 1 Builtin yes yes no 23 0 UOHDZX+VnURWPalladioL Type 1 Custom yes 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yes 379 0 ATLADD+PalatinoLinotype-Bold TrueType WinAnsi yes yes yes 383 0 RQTTHV+PalatinoLinotype-Roman TrueType WinAnsi yes yes yes 387 0 JMVSZL+PalatinoLinotype-Italic TrueType WinAnsi yes yes yes 401 0 ATLADD+PalatinoLinotype-Bold TrueType WinAnsi yes yes yes 405 0 RQTTHV+PalatinoLinotype-Roman TrueType WinAnsi yes yes yes 409 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-10-02 03:54:21 CEST RepresentationInformation: chemosensors_a2021v9n3p46.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2023-03-31 11:50:34 CEST Size: 2679205 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 546 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Experimental Destination: section.2 Children: Item: Title: Chemicals and Reagents Destination: subsection.2.1 Item: Title: Apparatus Destination: subsection.2.2 Item: Title: Electrodes Fabrication Destination: subsection.2.3 Children: Item: Title: Fabrication of Electrode E1 Destination: subsubsection.2.3.1 Item: Title: Fabrication of Electrodes E2, E3, and E4 Destination: subsubsection.2.3.2 Item: Title: Electrochemical Measurements Destination: subsection.2.4 Children: Item: Title: Cyclic Voltammetric Response Destination: subsubsection.2.4.1 Item: Title: Reproducibility Study Destination: subsubsection.2.4.2 Item: Title: Measurements of Real Water Samples Destination: subsection.2.5 Item: Title: Results and Discussion Destination: section.3 Children: Item: Title: Voltammetric Array Response Destination: subsection.3.1 Item: Title: Calibration Curves Destination: subsection.3.2 Item: Title: Reproducibility Study Destination: subsection.3.3 Item: Title: Real Samples Detection Destination: subsection.3.4 Item: Title: Conclusions Destination: section.4 Item: Title: References Destination: section.4 Info: Title: Determination of Chemical Oxygen Demand (COD) Using Nanoparticle-Modified Voltammetric Sensors and Electronic Tongue Principles Author: Qing Wang and Manel del Valle Subject: This manuscript reports the use of nanoparticle-modified voltammetric sensors for the rapid and green determination of chemical oxygen demand in river waters and waters from agricultural waste. Four different variants of modified electrodes have been prepared: CuO nanoparticles electrogenerated over Cu and covered with Nafion film (CuO/Cu-Nf), and graphite epoxy composites modified with Cu, CuO, and Cu Ni alloy nanoparticles. The response features of these electrodes were assessed by calibrating them vs. glucose, glycine, ethyleneglycol, and hydrogenphtalate in alkaline media, as samples providing different difficulty in their (bio)degradation characteristics. The most sensitive electrode was demonstrated to be the (CuO/Cu-Nf) electrode, with an LOD of 12.3 mg O2L-1. The joint information provided by the sensor array showed the ability of estimating both the organic load and the type of sample in terms of difficulty of degradation, in what can be named an intelligent sensor assembly. 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