@article{munoz_kolbe_siloto_oliveira_angnes_2007,  title={Ultrasound-assisted treatment of coconut water samples for potentiometric stripping determination of zinc},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000200025},  DOI={10.1590/S0103-50532007000200025},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Munoz, Rodrigo A. A. and Kolbe, Matias and Siloto, Rita C. and Oliveira, Pedro V. and Angnes, Lucio},  year={2007},  month={Mar},  pages={410–415} }