Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique.
Pulsed voltammetry has been used to detect and quantify glyphosate on buffered water in presence of ammonium nitrate and humic substances. Glyphosate is the most widely used herbicide active ingredient in the world. It is a non-selective broad spectrum herbicide but some of its health and environmental effects are still being discussed. Nowadays, glyphosate pollution in water is being monitored but quantification techniques are slow and expensive. Glyphosate wastes are often detected in countryside water bodies where organic substances and fertilizers (commonly based on ammonium nitrate) may also be present. Glyphosate also forms complexes with humic acids so these compounds have also been taken into consideration. The objective of this research is to study the interference of these common pollutants in glyphosate measurements by pulsed voltammetry. The statistical treatment of the voltammetric data obtained lets us discriminate glyphosate from the other studied compounds and a mathematical model has been built to quantify glyphosate concentrations in a buffer despite the presence of humic substances and ammonium nitrate. In this model, the coefficient of determination (R(2)) is 0.977 and the RMSEP value is 2.96 × 10(-5) so the model is considered statistically valid.
Instituto Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València, Cami de Vera s/n, 46022 Valencia, Spain.
Pablo
P
Martínez Gil
Nicolas
N
Laguarda-Miro
Juan Soto
JS
Camino
Rafael Masot
RM
Peris
D055664:Electrochemical Techniques / Q000706:statistics & numerical data; D004566:Electrodes; D005998:Glycine / Q000031:analogs & derivatives* / Q000302:isolation & purification; D006540:Herbicides / Q000302:isolation & purification*; D006812:Humic Substances / Q000032:analysis*; D015233:Models, Statistical; D009566:Nitrates / Q000737:chemistry*; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D000097797:Glyphosate
D005998:Glycine; D006540:Herbicides; D006812:Humic Substances; D009566:Nitrates; D014874:Water Pollutants, Chemical; D000097797:Glyphosate; C006568:ammonium nitrate
Ammonium nitrate; Glyphosate; Humic substance; Mathematical model; Voltammetry