@article{seijó echevarría_del tóro déniz_martinéz sáez_rosell juan_1997,  title={Concentration of Pb (II) by adsorption and its atomic absorption spectrometric determination},  volume={22},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46701997000100016},  DOI={10.1590/S0100-46701997000100016},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={SEIJÓ ECHEVARRÍA, Marlene and DEL TÓRO DÉNIZ, Rubén and MARTINÉZ SÁEZ, Silvio and ROSELL JUAN, Francisco},  year={1997},  pages={199–203} }