Improved detection limits for phthalates by selective solid-phase micro-extraction
Type
Conference PaperKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Sensing, Magnetism and Microsystems Lab
Date
2016-03-30Online Publication Date
2016-03-30Print Publication Date
2015-12Permanent link to this record
http://hdl.handle.net/10754/622559
Metadata
Show full item recordAbstract
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.Conference/Event name
9th International Conference on Sensing Technology, ICST 2015ae974a485f413a2113503eed53cd6c53
10.1109/ICSensT.2015.7438493