@article{sotomayor_raimundo jr_rohwedder_oliveira neto_2010,  title={A pH optode based on thymol blue: application to determination of CO2 using flow injection analysis system},  volume={35},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702010000200004},  DOI={10.1590/S0100-46702010000200004},  number={2},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Sotomayor, M.D.P.T. and Raimundo Jr, I.M. and Rohwedder, J.J. R. and Oliveira Neto, G.},  year={2010},  pages={33–43} }