TY - JOUR
T1 - Micro-scale membrane extraction of glyphosate and aminomethylphosphonic acid in water followed by high-performance liquid chromatography and post-column derivatization with fluorescence detector
AU - Piriyapittaya, Montra
AU - Jayanta, Siripastr
AU - Mitra, Somenath
AU - Leepipatpiboon, Natchanun
N1 - Funding Information:
This work was financially supported from the Thailand Research Fund (TRF) and Graduate School of Chulalongkorn University.
PY - 2008/5/2
Y1 - 2008/5/2
N2 - 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 μL 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 μg/L for glyphosate and 3.40 μg/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.
AB - 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 μL 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 μg/L for glyphosate and 3.40 μg/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.
KW - Aminomethylphosphonic acid
KW - Carrier-mediated transport
KW - Glyphosate
KW - Membrane extraction
KW - Micro-extraction
KW - SLME
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U2 - 10.1016/j.chroma.2008.01.074
DO - 10.1016/j.chroma.2008.01.074
M3 - Article
C2 - 18295220
AN - SCOPUS:41949138616
SN - 0021-9673
VL - 1189
SP - 483
EP - 492
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -