Issue 10, 2019

Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay

Abstract

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.

Graphical abstract: Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay

Supplementary files

Article information

Article type
Paper
Submitted
27 Feb 2019
Accepted
08 Apr 2019
First published
09 Apr 2019

Analyst, 2019,144, 3357-3363

Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay

M. A. Dominguez, M. Insausti, R. Ilari and G. P. Zanini, Analyst, 2019, 144, 3357 DOI: 10.1039/C9AN00387H

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