DEVELOPMENT OF A COLLOIDAL BIOSENSOR FOR HEAVY METAL DETECTION
Resumen
Due to their optical and physicochemical properties, nanoparticles (NPs) have been widely studied in the field of biodetection. For the recognition of heavy metals, sensors based on gold nanoparticles (NPAu) have the ability to yield similar results as those obtained by using traditional equipment, because, when interacting with the metal ion of interest, when analyzing by ultraviolet-visible spectroscopy (UV-Vis), it is possible to recognize this interaction through the intensity of the absorbance band by surface plasmon resonance (SPR). Plant extracts contain compounds whose functional groups interact and reduce metal ions, thus favoring the green synthesis capacity of nanoparticles and the plasmonic detection of heavy metals. The objective of this work was to evaluate gold nanoparticles (NPAu) obtained by green synthesis of NPAu with plant extracts of Baccopa monnieri and the latex of Jatropha curcas with the intention of designing an ecological route of NPAu synthesis with biodetection activity for Hg ions, Cd and Cr methylmercury chloride (CH3HgCl), cadmium chloride (CdCl2) and chromium trioxide (CrO3) dissolved in water at different concentrations.