A new solid-phase extraction disk based on a sheet of single-walled carbon nanotubes

Analytical and Bioanalytical Chemistry
Hong Yun NiuGuibin Jiang

Abstract

A new kind of solid-phase extraction disk based on a sheet of single-walled carbon nanotubes (SWCNTs) is developed in this study. The properties of such disks are tested, and different disks showed satisfactory reproducibility. One liter of aqueous solution can pass through the disk within 10-100 min while still allowing good recoveries. Two disks (DD-disk) can be stacked to enrich phthalate esters, bisphenol A (BPA), 4-n-nonylphenol (4-NP), 4-tert-octylphenol (4-OP) and chlorophenols from various volumes of solution. The results show that SWCNT disks have high extraction ability for all analytes. The SWCNT disk can extract polar chlorophenols more efficiently than a C(18) disk from water solution. Unlike the activated carbon disk, analytes adsorbed by the new disks can be eluted completely with 8-15 mL of methanol or acetonitrile. Finally, the DD-disk system is used to pretreat 1000-mL real-world water samples spiked with BPA, 4-OP and 4-NP. Detection limits of 7, 25, and 38 ng L(-1) for BPA, 4-OP, and 4-NP, respectively, were achieved under optimized conditions. The advantages of this new disk include its strong adsorption ability, its high flow rate and its easy preparation.

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Citations

Jun 12, 2013·Analytica Chimica Acta·Bo-Tao ZhangJin-Ming Lin
Jul 24, 2012·Environmental Science & Technology·Mingying ZouXuehua Li
May 24, 2014·Journal of Hazardous Materials·E Caballero-DíazM Valcárcel
Mar 15, 2011·Chemosphere·Krystyna Pyrzynska
Nov 17, 2009·Journal of Chromatography. a·Lidia M Ravelo-PérezMiguel Angel Rodríguez-Delgado
Dec 19, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Sujittra PoorahongProespichaya Kanatharana
May 26, 2010·Analytical Chemistry·A I López-LorenteM Valcárcel

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