title: Evaluation of a reconfigurable portable instrument for copper determination based on luminescent carbon dots.
abstract: A portable reconfigurable platform for copper (Cu(II)) determination based on luminescent carbon dot (Cdots) quenching is described. The electronic setup consists of a light-emitting diode (LED) as the carbon dot optical exciter and a photodiode as a light-to-current converter integrated in the same instrument. Moreover, the overall analog conditioning is simply performed with one integrated solution, a field-programmable analog array (FPAA), which makes it possible to reconfigure the filter and gain stages in real time. This feature provides adaptability to use the platform as an analytical probe for carbon dots coming from different batches with some variations in luminescence characteristics. The calibration functions obtained that fit a modified Stern-Volmer equation were obtained using luminescence signals from Cdots quenching by Cu(II). The analytical applicability of the reconfigurable portable instrument for Cu(II) using Cdots has been successfully demonstrated in tap water analysis.
authors: ECsens, Department of Analytical Chemistry, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain. alfonsos@ugr.es.
authors: Alfonso
authors: A
authors: Salinas-Castillo
authors: ECsens, Department of Electronics and Computer Technology, CITIC-ETSIIT, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Diego P
authors: DP
authors: Morales
authors: ECsens, Department of Analytical Chemistry, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Alejandro
authors: A
authors: Lapresta-Fernández
authors: ECsens, Department of Analytical Chemistry, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: María
authors: M
authors: Ariza-Avidad
authors: ECsens, Department of Electronics and Computer Technology, CITIC-ETSIIT, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Encarnación
authors: E
authors: Castillo
authors: ECsens, Department of Electronics and Computer Technology, CITIC-ETSIIT, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Antonio
authors: A
authors: Martínez-Olmos
authors: ECsens, Department of Electronics and Computer Technology, CITIC-ETSIIT, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Alberto J
authors: AJ
authors: Palma
authors: ECsens, Department of Analytical Chemistry, Campus Fuentenueva, Faculty of Sciences, University of Granada, 18071, Granada, Spain.
authors: Luis Fermin
authors: LF
authors: Capitan-Vallvey
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000032:analysis*; D049449:Luminescence; D012015:Reference Standards; D014961:X-Ray Diffraction
chemical_list: D002244:Carbon; D003300:Copper
keywords: Carbon dots; Copper determination; FPAA; Luminescence; Reconfigurable electronics