In-syringe-stirring: A novel approach for magnetic stirring-assisted dispersive liquid-liquid microextraction

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dc.contributor.author Horstkotte, Burkhard
dc.contributor.author Suárez Sánchez, Ruth
dc.contributor.author Solich, Petr
dc.contributor.author Cerdà Martín, Víctor
dc.date.accessioned 2018-09-21T12:23:36Z
dc.date.available 2018-09-21T12:23:36Z
dc.identifier.uri http://hdl.handle.net/11201/147598
dc.description.abstract [eng] For the first time, the use of a magnetic stirrer within the syringe of an automated syringe pump and the resulting possible analytical applications are described. A simple instrumentation following roughly the one from sequential injection analyzer systems is used in combination with an adaptor, which is placed onto the barrel of a glass syringe. Swirling around the longitudinal axis of the syringe and holding two strong neodymium magnets, it causes a rotating magnetic field and serves as driver for a magnetic stirring bar placed inside of the syringe. In a first study it was shown that this approach leads to a sealed but also automatically adaptable reaction vessel, the syringe, in which rapid and homogeneous mixing of sample with the required reagents within short time can be carried out. In a second study in-a-syringe magnetic stirring-assisted dispersive liquid-liquid microextraction (MSA-DLLME) was demonstrated by the application of the analyzer system to fluorimetric determination of aluminum in seawater samples using lumogallion. A linear working range up to 1.1 mol L−1 and a limit of detection of 6.1 nmol L−1 were found. An average recovery of 106.0% was achieved for coastal seawaters with a reproducibility of 4.4%. The procedure lasted 210 s including syringe cleaning and only 150 L of hexanol and 4.1 mL of sample were required.
dc.format application/pdf
dc.relation.isformatof Versió postprint del document publicat a: https://doi.org/10.1016/j.aca.2013.05.049
dc.relation.ispartof Analytica Chimica Acta, 2013, vol. 788, p. 52-60
dc.rights (c) Elsevier B.V., 2013
dc.subject.classification 543 - Química analítica
dc.subject.other 543 - Analytical chemistry
dc.title In-syringe-stirring: A novel approach for magnetic stirring-assisted dispersive liquid-liquid microextraction
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion
dc.date.updated 2018-09-21T12:23:36Z
dc.subject.keywords In-Syringe Magnetic Stirring-Assisted DLLME
dc.subject.keywords liquid-liquid microextraction
dc.subject.keywords Single-drop extraction
dc.subject.keywords Aluminum
dc.subject.keywords seawater
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.identifier.doi https://doi.org/10.1016/j.aca.2013.05.049


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