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dc.contributor.authorMokgadi, Janes
dc.contributor.authorBatlokwa, Shima
dc.contributor.authorMosepele, Keta
dc.contributor.authorObuseng, Veronica
dc.contributor.authorTorto, Nelson
dc.date.accessioned2015-03-19T09:42:05Z
dc.date.available2015-03-19T09:42:05Z
dc.date.issued2013-10-08
dc.identifier.citationMokgadi Janes et.al. (2013) Pressurized hot water extraction coupled to molecularly imprinted polymers for simultaneous extraction and clean-up of pesticides residues in edible and medicinal plants of the Okavango Delta, Botswana, Molecular Imprinting, Vol. 1, pp. 55- 64en_US
dc.identifier.issn2084-8803 (Online)
dc.identifier.urihttp://hdl.handle.net/10311/1350
dc.description.abstractIn this study, an in-cell extraction and clean-up approach, employing pressurized hot water extraction (PHWE) coupled to a molecularly imprinted polymer (MIP) is proposed. The selectivity of PHWE was improved through the use of a chlorophyll MIP (PHWE-MIP) for the determination of organochlorine pesticides residue levels in various edible and medicinal plants of the Okavango Delta, Botswana. The PHWE-MIP method achieved simultaneous extraction and clean-up. PHWE employed an optimal temperature of 260 °C, pressure of 90 bar and flow rate of 1 mL min-1 in 10 min for the extraction of the pesticides from plants while the MIP selectively overcame the interfering chlorophyll prior to analysis with gas chromatograph coupled to electron capture detector or mass spectrometer (GC-ECD/MS). The results obtained were compared to the QuEChERS Official Method 2007:01 for pesticides residue analysis. The proposed method seems to be nearly fully automated, environmental friendly, selective, simple and quick. Moreover, the recoveries of planar pesticides were improved (93-95%) with relative standard deviations (%RSD) of less than 10%.en_US
dc.description.sponsorshipThis work was supported United Nations Development Program – Global Environmental Facility – Small Grants Programme Botswana (UNDP-GEF/SGF-Botswana), Department of Chemistry, University of Botswana main campus as well as the Okavango Research Centre Institute (ORI), Andrew Mellon Foundation and STINT (the Swedish Foundation for International Cooperation in Research and Higher Education, YR2009-7015).en_US
dc.language.isoenen_US
dc.publisherDe Gruyter, http://www.degruyter.com/en_US
dc.rightsThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs license,(http://creativecommons.org/licenses/by-nc-nd/3.0/), which means that the text may be used for non-commercial purposes, provided credit is given to the author.en_US
dc.subjectSubcritical water extractionen_US
dc.subjectMolecular imprinted polymersen_US
dc.subjectIn-cell clean upen_US
dc.subjectSample preparationen_US
dc.subjectEnvironmentally friendlyen_US
dc.titlePressurized hot water extraction coupled to molecularly imprinted polymers for simultaneous extraction and clean-up of pesticides residues in edible and medicinal plants of the Okavango Delta, Botswanaen_US
dc.typePublished Articleen_US
dc.linkhttp://www.degruyter.com/view/j/molim.2012.1.issue/molim-2013-0003/molim-2013-0003.xmlen_US


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