Please use this identifier to cite or link to this item:
https://scholarbank.nus.edu.sg/handle/10635/75884
DC Field | Value | |
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dc.title | Determination of acidic herbicides in surface water by solid-phase extraction followed by capillary zone electrophoresis | |
dc.contributor.author | Qin, W. | |
dc.contributor.author | Wei, H. | |
dc.contributor.author | Li, S.F.Y. | |
dc.date.accessioned | 2014-06-23T05:35:51Z | |
dc.date.available | 2014-06-23T05:35:51Z | |
dc.date.issued | 2002-08 | |
dc.identifier.citation | Qin, W.,Wei, H.,Li, S.F.Y. (2002-08). Determination of acidic herbicides in surface water by solid-phase extraction followed by capillary zone electrophoresis. Journal of Chromatographic Science 40 (7) : 387-391. ScholarBank@NUS Repository. | |
dc.identifier.issn | 00219665 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/75884 | |
dc.description.abstract | A rapid solid-phase extraction-capillary zone electrophoresis (CZE) method for determining 2,4-dichlorophenoxyacetic acid, 4-(2,4- dichlorophenoxy) butyric acid, and 2,4,5-trichlorophenoxyacetic acid in real water samples is described. Factors affecting the recoveries and detection of the targets are investigated. With samples being acidified to pH 2 and salted by sodium sulfate to 2% (w/w), an average recovery of greater than 85% is obtained using ethyl acetate as the eluent on an octadecylsilane-bonded silica cartridge. A running buffer of 5mM sodium tetraborate in a water-acetonitrile mixture (70:30, v/v) adjusted to pH 9 is employed in the CZE analysis, and the targets can be analyzed within 7 min with good reproducibility and acceptable sensitivity. The method is suitable for detecting herbicide residues of subparts-per-billion levels in surface water. A local pond water is analyzed, and the concentrations of 2,4-dichlorophenoxyacetic acid and 4-(2,4-dichlorophenoxy) butyric acid are detected to be 0.27 ± 0.03 ppb and 0.61 ± 0.08 ppb, respectively. | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | CHEMISTRY | |
dc.description.sourcetitle | Journal of Chromatographic Science | |
dc.description.volume | 40 | |
dc.description.issue | 7 | |
dc.description.page | 387-391 | |
dc.description.coden | JCHSB | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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