Determination of glyphosate and its metabolite aminomethylphosphonic acid in fruit juices using supported-liquid membrane preconcentration method with high-performance liquid chromatography and UV detection after derivatization with p-toluenesulphonyl chloride

A Fast and Simple Analysis of Glyphosate in Tea Beverages by Capillary Electrophoresis with On-Line Copper(II)-Glyphosate Complex Formation

“…22) This means that glyphosate forms a complex with the Cu(II) ion during electrophoretic runs and that the complex migrates as an anion. The migration time of glyphosate increased with increasing concentration of CuSO 4 (Fig. 2).…”

“…Using gas chromatography analysis, derivatization of glyphosate is required to lower its polarity and enhance its volatility. 1,2) High performance liquid chromatographic (HPLC) [3][4][5] and capillary electrophoretic (CE) 6,7) methods also usually require derivatization of glyphosate to detect it by UV-absorption or fluorescence, because glyphosate possesses no chromophore. These analytic methods with derivatization can determine low levels of glyphosate, but the derivatization method is tedious and time-consuming.…”

Overview of Analytical Techniques for Herbicides in Foods

“…Capillary electrophoresis (Corbera et al, 2005), as an important separation technique due to its high resolving power and speed, was also reported for glyphosate anaysis. Some (Khrolenko & Wieczorek, 2005) used p-toluenesulfonyl chloride for derivatization prioe to CE separation, others (Cikalo et al, 1996) incorporates ribonucleotides into the background electrolyte to realize the indirect photometric detection. Chang (Chang & Liao, 2002) employed fluorescein as the buffer fluorophore and an argon-ion laser to induce the fluorescence background for detection of the glyphosate, AMPA, glufosinate and MPPA.…”

Liquid chromatographic determination of glyphosate and aminomethylphosphonic acid residues in rapeseed with MS/MS detection or derivatization/fluorescence detection

“…Derivatization with p-toluenesulfonyl chloride [12], p-nitrobenzoyl chloride [38], 9-fluorenylmethyl chloroformate (FMOC-Cl) [39][40][41], (+)-1-(9-fluorenyl)ethyl chloroformate [42], trimethyl orthoacetate, or N-methyl-N-(tertbutyldimethylsilyl)trifluoroacetamide [43], makes the determination both tedious and time-consuming.…”