@article{mello_rodrigues_nunes_mattos_müller_dressler_flores_2011,  title={Determination of metal impurities in carbon nanotubes by direct solid sampling electrothermal atomic absorption spectrometry},  volume={22},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532011000600006},  DOI={10.1590/S0103-50532011000600006},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Mello, Paola A. and Rodrigues, Luiz Frederico and Nunes, Matheus A. G. and Mattos, Julio Cezar P. and Müller, Edson I. and Dressler, Valderi L. and Flores, Erico M. M.},  year={2011},  month={Jun},  pages={1040–1049} }