UNSPECIFIED (2009) New Hybrid Sol-Gel Coating For Solid Phase Microextraction. In: UNSPECIFIED, (ed.) Proceedings of Second International Conference and Workshops on Basic and Applied Sciences & Regional Annual Fundamental Science Seminar 2009. Faculty of Science, Universiti Teknologi Malaysia, - . ISBN 978-983-9805-73-4
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A new 2-hydroxymethyl-18 crown-6 and polydimethylsiloxane (2OHMe-18C6/PDMS) hybrid fiber coating for solid phase microextraction (SPME) was prepared using sol-gel technology with methyltrimethoxy-silane (MTMOS)as precursor and hydroxy-terminated polydimethylsiloxane(OH-TPDMS) and 2OHMe-18C6 as coating material. Three different compositions of sol-gel were used to synthesize three different 2OHMe-18C6/PDMS hybrid and its extraction capabilities towards three selected organophosphorus pesticides, OPPs namely chlorpyrifos, diazinon and profenofos was assessed and compared to commercial 100 Î¼m PDMS fiber. All three sol-gel compositions used showed superior extraction performances towards the selected OPPs compared to the commercial SPME fiber. The successful binding of 2OHMe-18C6/PDMS was confirmed from Fourier Transform Infra Red Spectroscopy (FT-IR). Field emission-scanning electron micrograph (FESEM) of the three hybrid coated fiber showed a non-homogeneous to homogenous surface. The new hybrid coating material had excellent thermal stability up to 350Â°C. Limits of detection of the OPPs using the newly developed sol-gel 2OHMe-18C6/PDMS hybrid SPME fiber coupled with gas-chromatography-electron capture detector (GC-ECD) is in the range of 7-39 Î¼g/L. Sol-gel coating technology offers a promising technique to vary the compositions of the sol-gel components to produce materials with different selectivity and performance.
|Item Type:||Book Section|
|Uncontrolled Keywords:||Sol-gel, solid phase microextraction, organophsophorus pesticides, hybrid 2-hydroxymethyl-18 crown-6/ polydi-methylsiloxane,|
|Subjects:||Q Science > QD Chemistry|
|Deposited By:||Dr Siew Ling Lee|
|Deposited On:||30 Jun 2009 07:36|
|Last Modified:||02 Jun 2010 01:58|
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