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Microfluidic paper-based device integrated with smartphone for point-of-use colorimetric monitoring of water quality index

[Display omitted] •Versatile and low-cost 3D printer method for building point-of-use device was proposed.•A disposable µPAD was used for determination of pH, water hardness and total phenols.•Smartphones were used for the quantification of analytical interest species.•Simple and fast colorimetric m...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2020-11, Vol.164, p.108085, Article 108085
Main Authors: da Silva, Vinicius Aparecido Oliani Pedro, de Freitas, Rafaela Cristina, de Oliveira, Paulo Roberto, Moreira, Roger Cardoso, Marcolino-Júnior, Luiz Humberto, Bergamini, Márcio Fernando, Coltro, Wendell K.T., Janegitz, Bruno Campos
Format: Article
Language:English
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Summary:[Display omitted] •Versatile and low-cost 3D printer method for building point-of-use device was proposed.•A disposable µPAD was used for determination of pH, water hardness and total phenols.•Smartphones were used for the quantification of analytical interest species.•Simple and fast colorimetric method was applied for monitoring the quality index in water samples. The measurements by lab-on-a-chip devices are very interesting regarding the reduction of reagents, time and cost. In this paper, we have described the construction and application of a new device based on colorimetric measurements using a smartphone camera and a microfluidic paper-based device (μPAD), both fixed in supports obtained through 3D printing, employing a polylactic acid filament. The μPAD was evaluated as a water quality index device by colorimetric monitoring of water hardness (Ca2+ and Mg2+), total phenols (catechol), and pH. Under optimized parameters, the proposed method presented a linear range between 20 and 560 mg L−1 for Ca2+ and Mg2+(hardness), 0.20 to 16 mg L−1 of catechol and pH from 4.7 to 12, and limits of detection of 0.083 mg L−1, 0.124 mg L−1 and 0.262, for water hardness, catechol, and pH, respectively. The proposed device was successfully applied for the quality monitoring of the distribution of water samples.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2020.108085