Study on microfluidic paper-based analytical device layouts for simultaneous analysis purposes applying colorimetric reactions

Abstract

In this project, the adequacy of different layouts for Paper-based Analytical Device (?PAD) for simultaneous analysis in mixtures was evaluated through the use of colorimetric reactions in their reactional zones. Hence, the following parameters of the ?PAD were varied: width of the hydrophobic barrier, width and length of the hydrophylic channel, shape and dimensions of the reactional zones, and geometry of the device. The analytical system used in this research was based in comercial tests for domestic quality control of pool water with pH measure through Phenol Red deprotonation, and free chlorine determination through o-Toluidine oxidation.