info:eu-repo/semantics/article
Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay
Fecha
2019-04-09Registro en:
Dominguez, Marina Alejandra; Insausti, Matías; Ilari, Romina; Zanini, Graciela Pilar; Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay; Royal Society of Chemistry; Analyst; 144; 10; 9-4-2019; 3357-3363
0003-2654
CONICET Digital
CONICET
Autor
Dominguez, Marina Alejandra
Insausti, Matías
Ilari, Romina
Zanini, Graciela Pilar
Resumen
A new green method was developed for the quantification of paraquat (PQ) in water samples based on the fluorescence emission enhancement of the herbicide signal after adsorption on sodium montmorillonite clay (MMT). Radiant emission processes are favored by increasing the molecular rigidity of the PQ since it adopts a planar position between the nano-sheets of the MMT. The advantages of the use of this clay are nontoxic, low cost and found in abundance in natural reserves. The proposed method was successfully used in determining PQ in natural water samples with recoveries of 73% to 95%. The fluorescence emission showed a good linear relationship with PQ concentrations from 2.0 to 8.0 μmol L-1 with a detection limit of 0.37 μmol L-1. The method is simple, inexpensive and does not require the use of reagents or organic solvents; which makes it very promising to achieve the goals of green chemistry. The proposed methodology could be the beginning of the development of future green sensors.