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    Improved detection limits for phthalates by selective solid-phase micro-extraction

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    Type
    Conference Paper
    Authors
    Zia, Asif I.
    Afsarimanesh, Nasrin
    Xie, Li
    Nag, Anindya
    Al-Bahadly, I. H.
    Yu, P. L.
    Kosel, Jürgen cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Sensing, Magnetism and Microsystems Lab
    Date
    2016-03-30
    Online Publication Date
    2016-03-30
    Print Publication Date
    2015-12
    Permanent link to this record
    http://hdl.handle.net/10754/622559
    
    Metadata
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    Abstract
    Presented research reports on an improved method and enhanced limits of detection for phthalates; a hazardous additive used in the production of plastics by solid-phase micro-extraction (SPME) polymer in comparison to molecularly imprinted solid-phase extraction (MISPE) polymer. The polymers were functionalized on an interdigital capacitive sensor for selective binding of phthalate molecules from a complex mixture of chemicals. Both polymers owned predetermined selectivity by formation of valuable molecular recognition sites for Bis (2-ethylhexyl) phthalate (DEHP). Polymers were immobilized on planar electrochemical sensor fabricated on a single crystal silicon substrate with 500 nm sputtered gold electrodes fabricated using MEMS fabrication techniques. Impedance spectra were obtained using electrochemical impedance spectroscopy (EIS) to determine sample conductance for evaluation of phthalate concentration in the spiked sample solutions with various phthalate concentrations. Experimental results revealed that the ability of SPME polymer to adsorb target molecules on the sensing surface is better than that of MISPE polymer for phthalates in the sensing system. Testing the extracted samples using high performance liquid chromatography with photodiode array detectors validated the results.
    Citation
    Zia AI, Afsarimanesh N, Li Xie, Nag A, Al-Bahadly IH, et al. (2015) Improved detection limits for phthalates by selective solid-phase micro-extraction. 2015 9th International Conference on Sensing Technology (ICST). Available: http://dx.doi.org/10.1109/ICSensT.2015.7438493.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    2015 9th International Conference on Sensing Technology (ICST)
    Conference/Event name
    9th International Conference on Sensing Technology, ICST 2015
    DOI
    10.1109/ICSensT.2015.7438493
    ae974a485f413a2113503eed53cd6c53
    10.1109/ICSensT.2015.7438493
    Scopus Count
    Collections
    Conference Papers; Electrical Engineering Program; Sensing, Magnetism and Microsystems Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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