Extraction and Preconcentration of the Herbicide Glyphosate and its Metabolite AMPA Using Anion-Exchange Solid Phases

The role of derivatization techniques in the analysis of glyphosate and aminomethyl-phosphonic acid by chromatography

“…According to this selection, out of twenty protocols, independent on the matrix tested, in twelve [48,[50][51][52]54,55,[57][58][59]61,64,66], the common enrichment technologies (SPE, anion or cation exchange in aqueous solutions) are followed by using FMOC; fluorescent derivatives of high responses are formed, in Indications, as in Tables 1A, 1B, aqueous solutions, mostly at pH 9, under mild conditions (from room temperature up to 40°C, from 20 min up to 24 h). Next to FMOC the use of the OPA-MCE reagent, providing also fluorescent derivatives, revealed applicability in practical use [49,56,63], primarily for detection, only.…”

Determination of glyphosate and aminomethylphosphonic acid in aqueous soil matrices: A critical analysis of the 9‐fluorenylmethyl chloroformate derivatization reaction and application to adsorption studies

“…At the final pH of the reaction these compounds exist as negatively charged species. The reported chromatographic separation of these compounds used RP C 18 and normal phase amino columns with different mixtures of ACN and phosphoric acid, and ammonium acetate or phosphate buffers at variable pH values as mobile phases , . GPS and AMPA are zwitterions with p K a values of 0.78, 2.29, 5.96, and 10.96, and 0.9, 5.6, and 10.2, respectively .…”

Novel pre-column derivatisation reagent for glyphosate by high-performance liquid chromatography and ultraviolet detection

“…In the literature, a great variety of chromatographic methods have been developed for the analysis of glyphosate. Both gas chromatography (GC) [2][3][4] and liquid chromatography (LC) [5][6][7][8] are used most with various detection systems. But LC method, with a pre-column derivatisation, is preferred over GC analysis because of the highly polar and low volatility of glyphosate, and with on chemical groups (i.e.…”