Microflow Injection System for Efficient Cu(II) Detection across a Broad Range
Ricart, David (Universitat Politècnica de Catalunya)
Dorado, Antonio David (Universitat Politècnica de Catalunya)
Lao-Luque, Conxita (Universitat Politècnica de Catalunya)
Baeza Labat, Maria del Mar (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2024
Resum:	In this study, a modular, multi-step, photometric microflow injection analysis (micro-FIA) system for the automatic determination of Cu(II) in a bioreactor was developed. The system incorporates diverse 3D-printed modules, including a platform formed by a mixer module to mix Cu(II) with hydroxylamine, which reduces Cu(II) to Cu(I) linked to a diluter module via a Tesla valve, a chelation mixer module, a disperser module, and a detector module provided by an LED light source at λ = 455 nm and a light dependence resistor (LDR) as a light intensity detector. The system measures the color intensity resulting from the chelation between Cu(I) and neocuproine. The micro-FIA system demonstrated good capability for automatic and continuous Cu(II) determination, in a wide range of Cu concentrations, from 34 to 2000 mg L -1. The device exhibits a good repeatability (coefficient of variation below 2% across the measured concentration range), good reproducibility, and has an accuracy of around 100% between 600 and 1900 mg L -1. Real samples were analyzed using both the micro-FIA system and an atomic absorption spectroscopy method, revealing no statistically significant differences. Additionally, a Tesla valve located before the detector substituted a 3-way solenoid valve, eliminating the need for moving parts.
Ajuts:	Agencia Estatal de Investigación PID2020-117520RA-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	3D-printed microfluidic platform ; Cu(II) ; Bioleaching ; Circular economy ; E-waste ; Micro-fia ; SDG 8 - Decent Work and Economic Growth ; SDG 12 - Responsible Consumption and Production
Publicat a:	Chemosensors, Vol. 12, Issue 7 (June 2024) , art. 119, ISSN 2227-9040

DOI: 10.3390/chemosensors12070119

15 p, 1.8 MB

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