Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0021-9673(02)00547-2
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dc.titleLiquid-liquid-liquid microextraction of aromatic amines from water samples combined with high-performance liquid chromatography
dc.contributor.authorZhu, L.
dc.contributor.authorTay, C.B.
dc.contributor.authorLee, H.K.
dc.date.accessioned2014-10-16T08:48:22Z
dc.date.available2014-10-16T08:48:22Z
dc.date.issued2002-07-19
dc.identifier.citationZhu, L., Tay, C.B., Lee, H.K. (2002-07-19). Liquid-liquid-liquid microextraction of aromatic amines from water samples combined with high-performance liquid chromatography. Journal of Chromatography A 963 (1-2) : 231-237. ScholarBank@NUS Repository. https://doi.org/10.1016/S0021-9673(02)00547-2
dc.identifier.issn00219673
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/95482
dc.description.abstractA simple preconcentration and clean-up liquid-liquid-liquid microextraction of aromatic amines is described in this paper. The compounds were extracted from 2.0 ml aqueous samples (donor phase) into an organic phase, layered on the donor phase, and then back extracted to a microdrop of aqueous receiving phase, suspended in the organic phase. After extraction, the microdrop was injected into the HPLC system directly for analysis. Optimal conditions of the extraction were donor phase (a1): 2 ml of water sample adjusted to pH 13 with NaOH-NaCl; organic phase (o), 150 μl ethyl acetate; and receiving phase (a2) of 2 μl aqueous solution at pH 2.1. The a1→o extraction time was 15 min and for o→a2, 30 s. 18-Crown-6 ether, which can complex with amine, was added to the aqueous receiving phase to improve the extraction performance. Enrichment factors ranged from 218 (for 4-nitroaniline) to 378 (for 4-chloro-2-aniline). The calibration curve for these anilines was linear within the range 2.5 ng/ml-2.5 μg/ml (r2=0.998). Detection limits ranged from 0.85 to 1.80 ng/ml (at S/N=3). This procedure can be a selective preconcentration method for aromatic amines present in water samples. © 2002 Elsevier Science B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/S0021-9673(02)00547-2
dc.sourceScopus
dc.subjectAmines, aromatic
dc.subjectEnvironmental analysis
dc.subjectExtraction methods
dc.subjectLiquid-liquid-liquid microextraction
dc.subjectWater analysis
dc.typeConference Paper
dc.contributor.departmentCHEMISTRY
dc.description.doi10.1016/S0021-9673(02)00547-2
dc.description.sourcetitleJournal of Chromatography A
dc.description.volume963
dc.description.issue1-2
dc.description.page231-237
dc.description.codenJCRAE
dc.identifier.isiut000177144300026
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