Glyphosate attachment on aminoactivated carriers for sample stabilization and concentration
University of Tartu, Institute of Chemistry, Ravila 14A, 50411, Tartu, Estonia *Correspondence: edith.viirlaid@ut.ee
Abstract:
Glyphosate (N-phosphonomethylglycine) is the most widely used non-selective postemergence herbicide for weed and vegetation control. The need for monitoring glyphosate levels in environmental samples and agricultural products proceeds from its extensive use due to the unregulated application and contradictory information about its toxicity on living organisms. In order to achieve high sensitivity and reliability of glyphosate assessment, stabilization and preconcentration steps are generally required for its determination in different samples. The aim of the present study was to develop and optimize possibilities for effective glyphosate stabilization and concentration using aminoactivated nano- and microparticles of different materials. The results show that the usage of aminoactivated iron (II,III) oxide magnetic nanoparticles for the attachment and concentration of glyphosate is a prospective option to be integrated with in situ analytical technologies (e.g. biosensors), as the whole processes of glyphosate attachment was efficiently and reproductively carried out within 20 minutes.
Key words:
amino-activated, analysis, concentration, glyphosate, magnetic iron oxide nanoparticles, silica., stabilization