Determination of glyphosate in the oxidation products of N-phoshonomethyl iminodiacetic acid by IR spectrometry

作者：Yushchenko D Yu^*; Malysheva L V; Baranova S S; Khlebnikova T B; Pai Z P

来源：Journal of Analytical Chemistry, 2013, 68(11): 961-964.

DOI：10.1134/S1061934813110166

• glyphosate
• N-phosphonomethyl iminodiacetic acid
• IR spectrometry

A method is developed for determining N-phosphonomethyl glycine (glyphosate) in the oxidation products of N-phosphonomethyl iminodiacetic acid (PMIDA) by IR spectrometry. In the IR spectra of glyphosate and PMIDA characteristic bands at 1562 and 721 cm(-1), respectively, are revealed; based on absorbance at these wavelength, quantitative determination of glyphosate in the presence of PMIDA is possible. For model mixtures a correlation is revealed between the actual glyphosate concentration and the one derived from absorbance at characteristic bands. As shown, NMR (H-1, P-31) and IR spectrometry yield comparable results. The method is verified by an analysis of the final product prepared by liquid-phase oxidation of PMIDA to glyphosate using hydrogen peroxide and may be utilized in quality control in its manufacture.

• 出版日期2013-11