| Title |
Microflow Injection System for Efficient Cu(II) Detection across a Broad Range |
| ID_Doc |
26930 |
| Authors |
Ricart, D; Dorado, AD; Lao-Luque, C; Baeza, M |
| Title |
Microflow Injection System for Efficient Cu(II) Detection across a Broad Range |
| Year |
2024 |
| Published |
Chemosensors, 12, 7 |
| DOI |
10.3390/chemosensors12070119 |
| Abstract |
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 lambda = 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. |
| Author Keywords |
Cu(II); 3D-printed microfluidic platform; micro-FIA; bioleaching; e-waste; circular economy |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001276615300001 |
| WoS Category |
Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation |
| Research Area |
Chemistry; Electrochemistry; Instruments & Instrumentation |
| PDF |
https://www.mdpi.com/2227-9040/12/7/119/pdf?version=1720157552
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