Application of smartphones as analytical tools Roberto Sáez-Hernández 1 , Kevin U. Antela 1 , Angel Morales-Rubio 1 , Adela R. Mauri-Aucejo 1 , M.J. Luque 2 , M.L. Cervera 1 1 Analytical Chemistry Department, University of Valencia, Spain, 2 Optics Department, Physics Faculty, University of Valencia, Spain The application of smartphones in the field of Analytical Chemistry has been a growing trend during the last years, due to their wide availability, low cost and improved technical characteristics [1]. More specifically, their camera sensors have become a very useful tool to carry out analytical determinations based on colour changes and properties of the samples. The main objective of this work is to serve as an introduction to the smartphone- based colorimetry field for an audience with chemical background. To it, a comprehensive introduction to the smartphone-based colorimetry is exposed, describing the fundamentals of colour science, and the different approaches that can be chosen to correctly capture and analyse colour data in Analytical Chemistry. Concepts like colour spaces (RGB, CIE L*a*b*, CIE L*C*h*...) are addressed so as to understand how colour is quantitatively described and interpreted. Also, the most important experimental aspects to be considered are also assessed, since they are a potential source of interferences which might lead to a wrong chemical interpretation of the results. Last, some examples of chemical analysis carried out using a smartphone detector by the research group are shown, mainly in the food analysis field, to illustrate its applicability in Analytical Chemistry. References 1. Capitán-Vallvey LF, López-Ruiz N, Martínez-Olmos A, et al (2015) Recent developments in computer vision-based analytical chemistry: A tutorial review. Anal. Chim. Acta 899:23–56
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