Universiti Teknologi Malaysia Institutional Repository

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

Wan Ibrahim, Wan Aini and Sanagi, Mohd. Marsin and H. H. , See and P. C., Hauser (2010) Rapid and direct determination of glyphosate, glufosinate, and aminophosphonic acid by online preconcentration CE with contactless conductivity detection. Electrophoresis, 31 (3). 575 -582. ISSN 1522-2683

[img] PDF (Abstract)
122Kb

Official URL: http://dx.doi.org/10.1002/elps.200900380

Abstract

Rapid and direct online preconcentration followed by CE with capacitively coupled contactless conductivity detection (CE-C4D) 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-C4D were successfully developed and optimized. Under optimized conditions, LODs in the range of 0.01–0.1?µM (1.7–11.1?µg/L) and sensitivity enhancements of 48- to 53-fold were achieved with the large volume sample stacking-CE-C4D method. By performing the field-enhanced sample injection-CE-C4D procedure, excellent LODs down to 0.0005–0.02?µM (0.1–2.2?µg/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.

Item Type:Article
Uncontrolled Keywords:CE, contactless conductivity detection, glyphosate, glufosinate, online preconcentration
Subjects:Q Science
Divisions:Science
ID Code:26636
Deposited By: Liza Porijo
Deposited On:18 Jul 2012 03:42
Last Modified:25 Aug 2014 04:06

Repository Staff Only: item control page