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Hemimicelles/admicelles supported on magnetic graphene sheets for enhanced magnetic solid-phase extraction
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.ORCID iD: 0000-0002-5729-1908
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
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2012 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1257, p. 1-8Article in journal (Refereed) Published
Abstract [en]

In this work, superparamagnetic nanoparticle-decorated graphene (MG) sheets were synthesized and used as support for hemimicelles/admicelles for solid-phase extraction (SPE) of different compounds from environmental water samples for the first time. The MG sheets were facilely synthesized by a one-step, one-pot redox reaction between graphene oxide and Fe(II). Due to the large surface area and unique nanosheet morphology, MG served as an excellent nano-scaled support material for hemimicelles and admicelles, exhibiting higher loading capacity than conventional materials and pure Fe₃O₄ nanoparticles. The MG sheets could be negatively or positively charged depending on solution pH, allowing the extraction to be conducted in different modes. In cationic mode, cetyltrimethylammonium bromide (CTAB) was used as micelle-forming reagent, and perfluoroalkyl and polyfluoroalkyl substances (PFASs) and alkylphenols were used as model analytes. In anionic mode, sodium dodecyl sulfate (SDS) was used as micelle-forming reagent and alkyltrimethylammonium salts were selected as analytes. In both modes, the formation processes of hemimicelles/admicelles on MG sheets were studied and the extraction conditions were optimized. For PFASs, the analytical sensitivity was enhanced by 50-113-fold by the extraction, and the method detection limits (MDLs) ranged from 0.15 to 0.50 ng/L. For alkyltrimethylammonium salts, the MDLs were in the range of 1.4-8.0 ng/L. In both modes, good recoveries (56.3-93.9%) and reproducibility (run-to-run RSDs<9.3%) were obtained. The results from this work show a potential new role of graphene in analytical sample preparation.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 1257, p. 1-8
Keywords [en]
Graphene, Solid-phase extraction, Hemimicelles/admicelles, Perfluoroalkyl and polyfluoroalkyl substances, Alkyltrimethylammonium salt
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-38427DOI: 10.1016/j.chroma.2012.08.028ISI: 000309087200001PubMedID: 22921358Scopus ID: 2-s2.0-84865634879OAI: oai:DiVA.org:oru-38427DiVA, id: diva2:765007
Note

Sponsors:

Grant Number National Basic Research Program of China Grant(s): 2009CB421605 

National Natural Science Foundation of China Grant(s): 21107120  20890111  20921063  20931160427 

State Key Laboratory of Chemo/Biosensing and Chemometrics Grant(s): 2010-2 

Available from: 2014-11-21 Created: 2014-11-07 Last updated: 2018-05-13Bibliographically approved

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Wang, Thanh

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