Ghani, M and Sararji, M and Maya, F and Cerda, V, Automated multisyringe stir bar sorptive extraction using robust montmorillonite/epoxy-coated stir bars, Journal of Chromatography A, 1445 pp. 10-18. ISSN 0021-9673 (2016) [Refereed Article]
© 2016 Elsevier B.V. All rights reserved.
Herein we present a simple, rapid and low cost strategy for the preparation of robust stir bar coatings based on the combination of montmorillonite with epoxy resin. The composite stir bar was implemented in a novel automated multisyringe stir bar sorptive extraction system (MS-SBSE), and applied to the extraction of four chlorophenols (4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol) as model compounds, followed by high performance liquid chromatography-diode array detection. The different experimental parameters of the MS-SBSE, such as sample volume, selection of the desorption solvent, desorption volume, desorption time, sample solution pH, salt effect and extraction time were studied. Under the optimum conditions, the detection limits were between 0.02 and 0.34 μg L−1. Relative standard deviations (RSD) of the method for the analytes at 10 μg L−1 concentration level ranged from 3.5% to 4.1% (as intra-day RSD) and from 3.9% to 4.3% (as inter-day RSD at 50 μg L−1 concentration level). Batch-to-batch reproducibility for three different stir bars was 4.6–5.1%. The enrichment factors were between 30 and 49. In order to investigate the capability of the developed technique for real sample analysis, well water, wastewater and leachates from a solid waste treatment plant were satisfactorily analyzed.
|Item Type:||Refereed Article|
|Keywords:||sample preparation, chromatography, montmorillonite, epoxy resin, stir bar sorptive extraction, multisyringe flow injection analysis, high performance liquid chromatography, chlorophenolsa|
|Research Division:||Chemical Sciences|
|Research Group:||Analytical chemistry|
|Research Field:||Separation science|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding knowledge|
|Objective Field:||Expanding knowledge in the chemical sciences|
|UTAS Author:||Maya, F (Mr Fernando Maya Alejandro)|
|Web of Science® Times Cited:||16|
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