Sonochemical Synthesized Manganese Oxide Nanoparticles as Fluorescent Sensor for Selenium (IV) Quantification. Application to Food and Drink Samples

ACOSTA, MARIANO; FERNÁNDEZ, LILIANA PATRICIA; TALIO, MARIA CAROLINA

JOURNAL OF FLUORESCENCE

SPRINGER/PLENUM PUBLISHERS

Año: 2023

1053-0509

Manganese oxide nanoparticles (MnO Nps), sonochemical synthesized and characterized in our laboratory, are proposedas fluorescent sensor for selenium (Se) determination. The new methodology has been developed based on the enhancingeffect of the Se(IV) on fluorescent emission of MnO Nps. Experimental variables that influence on fluorimetric sensitivitywere optimized. The calibration graph using zerothorder regression was linear from 0.189 ng L−1 to 8.00 × 103μg L−1,with correlation coefficient better than 0.99. Under the optimal conditions, the limits of detection and quantification wereof 0.062 ng L−1 and 0.189 ng L−1, respectively. The trueness of the methodology was assessed through standard additionmethod obtaining recovery near to 100%. This method showed good tolerance to foreign ions, particularly to Se(VI), andwas applied to determination of Se(IV) trace in food and drink samples with satisfactory results. With the intention of preservingthe environment from harmful effects, a degradation study of the used nanomaterials has been included for theirsubsequent disposal.