Rapid and direct determination of glyphosate, glufosinate, and aminophosphonic acid by online preconcentration CE with contactless conductivity detection

Electrophoresis
Hong Heng SeeMohd Marsin Sanagi

Abstract

Rapid and direct online preconcentration followed by CE with capacitively coupled contactless conductivity detection (CE-C(4)D) is evaluated as a new approach for the determination of glyphosate, glufosinate (GLUF), and aminophosphonic acid (AMPA) in drinking water. Two online preconcentration techniques, namely large volume sample stacking without polarity switching and field-enhanced sample injection, coupled with CE-C(4)D were successfully developed and optimized. Under optimized conditions, LODs in the range of 0.01-0.1 microM (1.7-11.1 microg/L) and sensitivity enhancements of 48- to 53-fold were achieved with the large volume sample stacking-CE-C(4)D method. By performing the field-enhanced sample injection-CE-C(4)D procedure, excellent LODs down to 0.0005-0.02 microM (0.1-2.2 microg/L) as well as sensitivity enhancements of up to 245- to 1002-fold were obtained. Both techniques showed satisfactory reproducibility with RSDs of peak height of better than 10%. The newly established approaches were successfully applied to the analysis of glyphosate, glufosinate, and aminophosphonic acid in spiked tap drinking water.

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Citations

Dec 14, 2011·Analytical Chemistry·Matthew GeigerMichael T Bowser
Nov 12, 2013·Journal of Chromatography. a·Fumihiko Kitagawa, Koji Otsuka
Mar 22, 2013·Journal of Chromatographic Science·Zhaoxiang ZhangYing Liu
Oct 11, 2015·Pest Management Science·William C KoskinenKathleen E Hall
Feb 12, 2013·Journal of Chromatography. a·Hong Heng SeePeter C Hauser
Jul 25, 2012·Journal of Chromatography. a·Jonas J P MarkFrank-Michael Matysik
Jan 4, 2012·Electrophoresis·Véréna PoinsotFrançois Couderc
Dec 21, 2010·Electrophoresis·Zdena MaláPetr Boček
May 3, 2014·Electrophoresis·Antonia María Rojano-Delgado, María D Luque de Castro
Apr 14, 2016·International Journal of Environmental Research and Public Health·Po-Ling ChangTai-Chia Chiu
Dec 18, 2013·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Fumihiko KitagawaKoji Otsuka

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