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Chitosan-modified cotton thread for the preconcentration and colorimetric trace determination of Co(II)
dc.contributor.author | Suarez, Willian Toito | |
dc.contributor.author | Franco, Methewa O.K. | |
dc.contributor.author | Capitán Vallvey, Luis Fermín | |
dc.contributor.author | Erenas Rodríguez, Miguel María | |
dc.date.accessioned | 2020-07-02T06:03:46Z | |
dc.date.available | 2020-07-02T06:03:46Z | |
dc.date.issued | 2020-06-08 | |
dc.identifier.citation | Microchemical Journal 158 (2020) 105137 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/62815 | |
dc.description.abstract | In this work we propose a thread-based microfluidic device (μTAD) for the preconcentration and colorimetric determination of Co(II) in water using a digital image. The reaction is based on complexation of Co(II) by 4-(2- pyridylazo) resorcinol (PAR), which changes the detection zone from yellow to red. PAR is immobilized in a chitosan membrane to retain the complex in the detection zone. The designed μTAD makes it possible to pre- concentrate and determine cobalt between 25 and 600 µg·L−1 with a relative standard deviation of 4% (n = 5), and a detection limit of 6.5 µg·L−1. The device permits an enhancement factor of 11 by combining the use of a chitosan retention membrane and a sample volume of 50 µL. Recovery experiments were performed in tap water to evaluate the accuracy of the method, and the results obtained compared to a reference method presents an error no higher than 5.7% | es_ES |
dc.description.sponsorship | This work was founded by Spanish “Ministerio de Economía y Competitividad” under Project CTQ2016-78754-C2-1-R and Junta de Andalucía under Projects B-FQM-243-UGR18 and P18-RT-2961. The project was partially supported by European Regional Development Funds (ERDF). Supporting Research in the State of Minas Gerais (Fapemig) (CEX-APQ-02436-15). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | µTAD | es_ES |
dc.subject | Thread-based microfluidic device | es_ES |
dc.subject | Digital image analysis | es_ES |
dc.subject | Cobalt determination | es_ES |
dc.title | Chitosan-modified cotton thread for the preconcentration and colorimetric trace determination of Co(II) | es_ES |
dc.type | journal article | es_ES |
dc.rights.accessRights | open access | es_ES |
dc.identifier.doi | https://doi.org/10.1016/j.microc.2020.105137 | |
dc.identifier.doi | https://doi.org/10.5281/zenodo.3906816 |