کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1166214 1491105 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An electrochemically enhanced solid-phase microextraction approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes composite coating for selective extraction of fluoroquinolones in aqueous samples
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
An electrochemically enhanced solid-phase microextraction approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes composite coating for selective extraction of fluoroquinolones in aqueous samples
چکیده انگلیسی

In this study, an electrochemically enhanced solid-phase microextraction (EE-SPME) approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes (MIPPy/MWCNTs) composite coating on Pt wire was developed for selective extraction of fluoroquinolone antibiotics (FQs) in aqueous samples. During the extraction, a direct current potential was applied to the MIPPy/MWCNTs/Pt fiber as working electrode in a standard three-electrode system, FQ ions suffered electrophoretic transfer to the coating surface and then entered into the shape-complimentary cavities by hydrogen-bonding and ion-exchange interactions. After EE-SPME extraction, the fiber was desorbed with desorption solvent for high-performance liquid chromatography (HPLC) analysis. Some parameters influencing EE-SPME extraction such as applied potential, extraction time, solution pH, ionic strength, and desorption solvent were optimized. EE-SPME showed good selectivity and higher extraction efficiency to FQs compared with that of traditional solid-phase microextraction. EE-SPME coupled with HPLC to determine FQs in water samples, the limits of detection (S/N = 3) for the selected FQs are 0.5–1.9 μg L−1. The proposed method was successfully used to the analysis of FQs spiked urine and soil samples, with recoveries of 85.1–94.2% for the urine samples and 89.8–95.5% for the soil samples.

Figure optionsDownload as PowerPoint slideHighlights
► Novel molecularly imprinted polypyrrole/multi-walled carbon nanotubes (MIPPy/MWCNTs) composite coating.
► An electrochemically enhanced solid-phase microextraction (EE-SPME) approach.
► EE-SPME showed good selectivity and high extraction efficiency to fluoroquinolone antibiotics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 727, 21 May 2012, Pages 26–33
نویسندگان
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