@article{ganjali_babaei_badiei_saberian_behbahani_ziarani_salavati- niasari_2006,  title={A novel method for fast enrichment and monitoring of hexavalent and trivalent chromium at the ppt level with modified silica MCM-41 and its determination by inductively coupled plasma optical emission spectrometry},  volume={29},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422006000300007},  DOI={10.1590/S0100-40422006000300007},  number={3},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Ganjali, Mohammad Reza and Babaei, Leila Hajiagha and Badiei, Alireza and Saberian, Kamal and Behbahani, Seiedmahmoudreza and Ziarani, Ghodsi Mohammadi and Salavati- Niasari, Masoud},  year={2006},  month={May},  pages={440–443} }