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. Sensors2017, 17, 1730.
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.
In the present work, a portable device system applied in the detection and classification of different metallic ions was proposed and developed, aiming at its application in the monitoring of hydrological systems like 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 technology and software based on virtual Instrumentation (NI LabView ®). The system was used as a colorimeter by using the chromogen reagent of 1-(2-pyridylazo)-2-naphthol (PAN) as an indicator and the results obtained together with the signal processing and pattern analysis using the method of the linear discriminant analysis, allowed to obtain excellent results in 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 in relation to those obtained from the UV-VIS spectrometers of high spectral resolution.
portable environmental monitoring systems; metallic ions detection; colorimetric system
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.