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Sensors 2017, 17(8), 1730;

Portable Multispectral Colorimeter for Metallic Ion Detection and Classification

Laboratório de Microeletrônica, Escola Politécnica da Universidade de São Paulo, São Paulo 05508-010, Brazil
Instituto Federal de Educação, Ciência e Tecnologia de São Paulo, Cubatão 11533-160, Brazil
Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo Andre 09210-580, Brazil
Centro de Capacitação e Pesquisa em Meio Ambiente (Cepema-USP), Cubatão 11540-990, Brazil
Author to whom correspondence should be addressed.
Received: 12 June 2017 / Revised: 20 July 2017 / Accepted: 25 July 2017 / Published: 28 July 2017
(This article belongs to the Special Issue Fluorescent Probes and Sensors)
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This work deals with a portable device system applied to detect and classify different metallic ions as proposed and developed, aiming its application for hydrological monitoring systems such as rivers, lakes and groundwater. Considering the system features, a portable colorimetric system was developed by using a multispectral optoelectronic sensor. All the technology of quantification and classification of metallic ions using optoelectronic multispectral sensors was fully integrated in the embedded hardware FPGA ( Field Programmable Gate Array) technology and software based on virtual instrumentation (NI LabView®). The system draws on an indicative colorimeter by using the chromogen reagent of 1-(2-pyridylazo)-2-naphthol (PAN). The results obtained with the signal processing and pattern analysis using the method of the linear discriminant analysis, allows excellent results during detection and classification of Pb(II), Cd(II), Zn(II), Cu(II), Fe(III) and Ni(II) ions, with almost the same level of performance as for those obtained from the Ultravioled and visible (UV-VIS) spectrophotometers of high spectral resolution. View Full-Text
Keywords: portable environmental monitoring systems; metallic ions detection; colorimetric system portable environmental monitoring systems; metallic ions detection; colorimetric system

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Braga, M.S.; Jaimes, R.F.V.V.; Borysow, W.; Gomes, O.F.; Salcedo, W.J. Portable Multispectral Colorimeter for Metallic Ion Detection and Classification. Sensors 2017, 17, 1730.

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