About this Chemistry article
Micro-scale Membrane Extraction of Glyphosate and Aminomethylphosphonic Acid in Water Followed by High-performance Liquid Chromatography and Post-column Derivatization with Fluorescence Detector by Montra Piriyapittaya; Siripastr Jayanta; Somenath Mitra; Natchanun Leepipatpiboon is a Chemistry article available to read on EtoBox.
A carrier-mediated supported liquid membrane micro-extraction using single hollow fiber membrane suitable for the determination of the herbicide glyphosate and its main metabolite aminomethylphosphonic acid in water is reported. A solution of 0.20 M Aliquat-336, a cationic carrier, in di-n-hexyl ether was selected as the supported liquid. A 20 microL of 1.0 M potassium chloride as the acceptor phase was filled in the membrane lumen. The membrane was immersed in a 20 mL of pH 9.0 sample solution. After 60-min extraction, the acceptor phase was analyzed by high-performance liquid chromatography with post-column derivatization. The enrichment factors were found to be 853 and 136 for glyphosate and aminomethylphosphonic acid, respectively. The method detection limits are 0.22 microg/L for glyphosate and 3.40 microg/L for aminomethylphosphonic acid. The procedure was validated and showed good accuracy and precision over a large linear dynamic range. The validated method was tested for the analysis of both analytes in spiked groundwater with good success.
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- Author
- Montra Piriyapittaya; Siripastr Jayanta; Somenath Mitra; Natchanun Leepipatpiboon
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)
- Published
- 2008
- Language
- EN
- Field
- Chemistry (Physical Sciences)