@article{santos_costa_pita_semaan_2010,  title={Potentiometric and conductimetric studies of chemical equilibria for pyridoxine hydrochloride in aqueous solutions: simple experimental determination of pKa values and analytical applications to pharmaceutical analysis},  volume={35},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702010000400010},  DOI={10.1590/S0100-46702010000400010},  number={4},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Santos, Thiago de Almeida Drumond dos and Costa, Diego Oliveira da and Pita, Samuel Silva da Rocha and Semaan, Felipe Silva},  year={2010},  pages={81–86} }