@article{santos_sabatke_herrmann_sturgeon_2021,  title={Evaluation of Sample Preparation Procedures for Determination of Cr(VI) in Cr<sub>2</sub>O<sub>3</sub> Pigments by Vis Spectrophotometry},  volume={64},  ISSN={1516-8913},  url={https://doi.org/10.1590/1678-4324-75years-2021200455},  DOI={10.1590/1678-4324-75years-2021200455},  number={spe},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Santos, Eder José dos and Sabatke, Mateus and Herrmann, Amanda Beatriz and Sturgeon, Ralph Edward},  year={2021},  pages={e21200455} }