@misc{10481/62815,
year = {2020},
month = {6},
url = {http://hdl.handle.net/10481/62815},
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%},
organization = {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).},
publisher = {Elsevier},
keywords = {µTAD},
keywords = {Thread-based microfluidic device},
keywords = {Digital image analysis},
keywords = {Cobalt determination},
title = {Chitosan-modified cotton thread for the preconcentration and colorimetric trace determination of Co(II)},
doi = {https://doi.org/10.1016/j.microc.2020.105137},
doi = {https://doi.org/10.5281/zenodo.3906816},
author = {Suarez, Willian Toito and Franco, Methewa O.K. and Capitán Vallvey, Luis Fermín and Erenas Rodríguez, Miguel María},
}