@article{rastegarzadeh_kalantaripour_2012,  title={Development of an optical redox chemical sensor for nitrite determination},  volume={35},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422012000400021},  DOI={10.1590/S0100-40422012000400021},  number={4},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Rastegarzadeh, Saadat and Kalantaripour, Mehdi},  year={2012},  pages={766–770} }