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http://hdl.handle.net/10400.14/40497
Título: | Iron determination in natural waters using a synthesised 3-hydroxy-4-pyridione ligand in a newly developed microfluidic paper-based device |
Autor: | Aguiar, Juliana I. S. Ribeiro, Susana O. Leite, Andreia Rangel, Maria Rangel, António O. S. S. Mesquita, Raquel B. R. |
Palavras-chave: | 3-hydroxy-4-pyridinone ligand In situ analysis Iron quantification sensor Microfluidic paper-based analytical device Natural waters |
Data: | 1-Fev-2023 |
Resumo: | This work describes the development of an iron sensor based on a microfluidic paper-based technique, to attain iron quantification in natural waters. A new water-soluble naphthalene-3-hydroxy-4-pyridione ligand was used as a colour reagent, as it formed an orange complex with iron. As a newly described ligand, several chemical and physical parameters, namely, the sample and reagent volumes and reagent concentrations, were studied related to the formation of the coloured complex. The microfluidic paper-based analytical device (μPAD) assembly, namely, the use of different types of filter paper and different numbers of layers, was developed to obtain the best performance. Under the optimal conditions, a linear correlation was obtained in the range of 0.25–2.00 mg/L of iron, with a minimum detectable value of 0.07 mg/L. The proposed μPAD method was validated by an analysis of the certified samples and by a comparison of the tested water samples with the inductively coupled plasma (ICP) results (RE < 10%). Then, the μPAD device was successfully applied to the determination of iron in tap water, well water, river water, and seawater, with no need for any prior sample pre-treatment; recovery studies were also performed (average = 100.3% with RSD = 4.2%). |
Peer review: | yes |
URI: | http://hdl.handle.net/10400.14/40497 |
DOI: | 10.3390/chemosensors11020101 |
ISSN: | 2227-9040 |
Aparece nas colecções: | CBQF - Artigos / Articles |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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64679565.pdf | 1,58 MB | Adobe PDF | Ver/Abrir |
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