Towards an autonomous microfluidic sensor for dissolved carbon dioxide determination
| Autor: | Miguel M. Erenas, Luis Fermín Capitán Vallvey, Nuria Lopez Ruiz, Dermot Diamond, Isabel María Pérez de Vargas Sansalvador, Maria Dolores Fernandez Ramos, Simon Coleman |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Time delay and integration
Instrumentation Microfluidics CO2 sensor Autonomous monitoring 02 engineering and technology 01 natural sciences Analytical Chemistry chemistry.chemical_compound Spectroscopy Aqueous solution business.industry 010401 analytical chemistry Detector 021001 nanoscience & nanotechnology Chip Water analysis 0104 chemical sciences Volumetric flow rate chemistry Carbon dioxide Optoelectronics 0210 nano-technology business |
| Zdroj: | Digibug. Repositorio Institucional de la Universidad de Granada instname Microchemical Journal |
| Popis: | In this work, we present a new system for the determination of dissolved carbon dioxide (from 7.2 ppm to 425.6ppm) in aqueous environments. Microfluidic technology has been incorporated in sensor design to reduce the volume of samples and reagents. Moreover, a detection system has been integrated in the chip, consisting of a white light-emitting diode as a light source and a high-resolution digital colour sensor as the detector, which are able to detect changes in colour produced by the reaction of the sensing chemistry and carbon dioxide in water. The optimised parameters found for the system are: flow rate 0.6 mL·min-1, integration time 30 s and the time for pumping of solutions was 3 min, obtaining a LOD of 7.2 ppm. The CO2 response, reproducibility, precision, and stability of the sensing chemistry have been studied and compared with those obtained using benchtop instrumentation (i.e. a spectrophotometer), obtaining good agreement. Talentia Postdoc Program launched by the Andalusian Knowledge Agency, co-funded by the European Union’s Seventh Framework Program, Marie Skłodowska-Curie actions (COFUND – Grant Agreement nº 267226) European Union's Horizon 2020 research and innovation programme under grant agreement No 706303 (Multisens) Spanish MINECO (CTQ2016-78754-C2-1-R) Unidad de Excelencia de Química aplicada a biomedicina y medioambiente of the University of Granada Science Foundation Ireland (INSIGHT Centre, Grant Number SFI/12/RC/2289) European Union (FP7 NAPES project, Project ID: 604241) |
| Databáze: | OpenAIRE |
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