title: Electromembrane surrounded solid phase microextraction using electrochemically synthesized nanostructured polypyrrole fiber.
abstract: Electromembrane surrounded solid phase microextraction using conductive polymers as the sorbent is carried out for the first time for extraction of two antidepressants including amitriptyline (AMI) and doxepin (DOX), as model analytes. The polypyrrole coating was prepared and utilized as both cathode and SPME sorbent. Different variables such as the conditions for preparation of polypyrrole fiber, pH of the donor and the acceptor phases, applied voltage, and extraction time were optimized. Under the optimized conditions, figures of merit of the proposed method were investigated in human whole blood and urine samples. Intra- and inter-assay precisions ranged between 3.1-7.5% and 7.6-12.3%, respectively were obtained in different extraction media. Detection limits of 0.15 and 0.05 for AMI and 0.3 and 0.1 ng mL(-1) for DOX were achieved in the urine and blood samples, respectively. Linearity of the method was studied up to 50.0 ng mL(-1) for both analytes and coefficients of determination better than 0.9966 were achieved. Regardless of the high sample cleanup, which makes the proposed method suitable for analysis of drugs from complicated matrices, clean chromatograms were obtained. Finally, the proposed method was applied for analysis of AMI and DOX in different real samples and reasonable data were obtained.
authors.affiliation: Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Mohammadkhani
authors.affiliation: Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran, Iran. Electronic address: yyamini@modares.ac.ir.
authors.forename: Yadollah
authors.initials: Y
authors.lastname: Yamini
authors.affiliation: Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Rezazadeh
authors.affiliation: Department of Analytical Chemistry, K. N. Toosi University of Technology, Tehran, Iran.
authors.forename: Shahram
authors.initials: S
authors.lastname: Seidi
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation* / Q000379:methods*; D004563:Electrochemistry; D004566:Electrodes; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000295:instrumentation*
chemical_list: D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole
keywords: Electromembrane extraction; Gas chromatography; Solid phase microextraction; Urine; Whole blood