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

摘要

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 (lPAD), both fixed in supports obtained through 3D printing, employing a polylactic acid filament. The lPAD 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. (C) 2020 Elsevier Ltd. All rights reserved.