@article { author = {Habibzadeh, Sepideh and Tavallail, Hossein and Esmaielzadeh, Sheida and Gharghani, Zahra}, title = {Introduction of a new nitrite-selective optical sensor for food analysis using a copper(II) schiff base complex}, journal = {Eurasian Chemical Communications}, volume = {2}, number = {2}, pages = {247-256}, year = {2020}, publisher = {Sami Publishing Company (SPC)}, issn = {2717-0535}, eissn = {2676-6280}, doi = {10.33945/SAMI/ECC.2020.2.10}, abstract = {A copper(II) Schiff base complex, [Cu(cd4OMeSalMeen)], methyl-2-{[1-methyl-2-(4-methoxy-phenolate)mehylidynenitrilo]ethyl}amino-1-cyclopentene dithiocarboxylate copper(II), was incorporated into triacetylcellulose membrane and applied as ionophore in order to develop an anion-selective optical sensor for the analysis of nitrite by absorption spectrophotometry. At optimum pH 3.0, a linear calibration curve was observed for nitrite in the range of 0.50 to 7.00 mgL-1 with a detection limit of 0.04 mgL-1. The response time of the optode (t95%) was found to be 8–10 min, depending on the nitrite ion concentration. The proposed sensor was fully recovered in nitric acid solution (0.1 M) and had acceptable reproducibility (RSD=1.9%). The optode exhibited good selectivity toward nitrite ion according to hard-soft acid base (HSAB) principle and the formation constant was calculated. The application of the sensor for determination of nitrite content in meat products was quiet successful.}, keywords = {Optical sensor,copper(II) Schiff base,nitrite,Spectrophotometry,formation constant}, url = {https://www.echemcom.com/article_92416.html}, eprint = {https://www.echemcom.com/article_92416_96fb7c1c0f4cf54fed80c9a61fd2964e.pdf} }