DESENVOLVIMENTO E APLICAÇÕES DE DISPOSITIVOS ANALÍTICOS DE BAIXO CUSTO FABRICADOS EM SUBSTRATO DE PAPEL

Abstract

Paper analytical devices have been presented as a fundamental tool for on-site analytical tests, since they are low cost, easy to walk and use and become a portable methodology. The development of paper analytical devices is increasingly being explored, thus having great possibilities of using what has already been reported in the literature and even improving or developing new techniques. In this type of device, colorimetric readings become a method for obtaining data, which also allows qualitative and quantitative analysis and in some cases it is possible to analyze multiple analytes in what is called multiplexed analysis. The methodologies for color change for analyzes can occur in different ways, being them by nanoparticles, dyes, redox and pH indicators, and each of the procedures have their advantages and disadvantages, that said, it is clear the study of the execution of the method for evaluate which best applies to the interest. This type of methodology presents several variables that must be worked on, among them the production of the devices themselves, the study of the substrate and the barrier and, mainly, the study of the captured images. In this chapter we will have a brief bibliographic survey referring to the study of color and image capture and the substrate used, which is paper.