Development and application of porous membrane-protected carbon nanotube micro-solid-phase extraction combined with gas chromatography/mass spectrometry

Analytical Chemistry
Chanbasha BasheerHian Kee Lee

Abstract

A novel, multiwalled carbon nanotube (MWCNT)-supported micro-solid-phase extraction (mu-SPE) procedure has been developed. A 6-mg sample of MWCNTs was packed inside a (2 cm x 1.5 cm) sheet of porous polypropylene membrane whose edges were heat-sealed to secure the contents. The mu-SPE device, which was wetted with dichloromethane, was then placed in a stirred sewage sludge sample solution to extract organophosporous pesticides, used here as model compounds. Tumbling of the extraction device within the sample solution facilitated extraction, and the porous membrane acted as a filter to exclude the extraction of extraneous materials. After extraction, analytes were desorbed in hexane and analyzed using gas chromatography/mass spectrometry. Since the porous membrane afforded protection of the MWCNTs, no further cleanup of the extract was required. The pi-pi electrostatic interaction with the analytes and the large surface area of MWCNTs facilitated the adsorption of analytes, with good selectivity and reproducibility. Under the optimized extraction conditions, the method showed good linearity in the range of 0.1-50 mug/L, repeatability of the extractions (RSD 2-8%, n = 4), and low limits of detection (1-7 pg/g). No analyte carryov...Continue Reading

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Citations

Oct 14, 2010·Analytical and Bioanalytical Chemistry·Chaudhery Mustansar Hussain, Somenath Mitra
Apr 19, 2011·Analytical and Bioanalytical Chemistry·Habib BagheriZahra Ayazi
Jun 4, 2013·Analytica Chimica Acta·Sazlinda KamaruzamanHong Heng See
Oct 1, 2013·Journal of Chromatography. a·Hakimu Nsubuga, Chanbasha Basheer
May 21, 2013·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Xiao-Lin HouXiang-Dang Du
Jul 27, 2010·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·N RastkariA Mesdaghinia
Mar 28, 2012·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Hankun ZhouYuting Cao
Jan 23, 2016·Journal of Chromatography. a·Maryam Lashgari, Hian Kee Lee
Jan 27, 2016·Journal of Chromatography. a·Habib BagheriSolmaz Banihashemi
Jul 5, 2015·Journal of Chromatography. a·Nor Akma Mamat, Hong Heng See
May 13, 2014·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Tshering PeldenProespichaya Kanatharana

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