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Simultaneous extraction of acidic and basic drugs via on-chip electromembrane extraction using a single-compartment microfluidic device

Abstract

In this study, a new chip was designed for simultaneous extraction of acidic and basic drugs by a single chamber on-chip electromembrane extraction (CEME) followed by high performance liquid chromatography. Diclofenac (DIC) and nalmefene (NAL) were selected as acidic and basic model analytes, respectively. In this device, simultaneous extraction of the analytes was carried out by a single compartment. The chip was composed of three PMMA (polymethyl methacrylate) parts with sandwiched structures and craved spiral microfluidic channels in each part. The middle part was cut and an "M" pattern provided interfaces for contact between sample solution flow and two porous polypropylene sheets on both sides. Two other parts had the same similar spiral channels dedicated to corresponding acceptor phases of the acidic and basic analytes and were located at both sides. Each polypropylene sheet was impregnated by the proper organic solvent for the acidic and basic analytes. Two platinum electrodes connected to a power supply were mounted at the bottom of the acceptor channels. These electrodes provided the electrical fields across SLMs to extract the analytes from a single sample flow. When the extraction was completed, the acceptor solutions were collected, mixed, and then injected into the chromatographic system. The effective parameters on the extraction efficiency were investigated and optimized. Under the optimal conditions, the calibration curves were linear in the range of 9.0–500 μg L−1 for NAL and 11.0–500 μg L−1 for DIC with the coefficient of determination (R2) higher than 0.9913. The relative standard deviations (RSD%) based on five replicate measurements were less than 6.3%. LOD values were 4.0 and 3.0 μg L−1 for DIC and NAL, respectively. Finally, the method was successfully applied to determinate DIC and NAL in the human urine samples and satisfactory results were obtained (recovery ≥ 90).

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Publication details

The article was received on 28 Aug 2018, accepted on 08 Nov 2018 and first published on 21 Nov 2018


Article type: Paper
DOI: 10.1039/C8AN01668B
Citation: Analyst, 2018, Accepted Manuscript
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    Simultaneous extraction of acidic and basic drugs via on-chip electromembrane extraction using a single-compartment microfluidic device

    F. Zarghampour, Y. Yamini, M. Baharfar and M. Faraji, Analyst, 2018, Accepted Manuscript , DOI: 10.1039/C8AN01668B

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