Molecularly Imprinted Stir Bar Sorptive Extraction Coupled with High-Performance Liquid Chromatography for Trace Analysis of Diclofenac in Different Real Samples

Document Type : Research Article

Authors

Department of Marine Chemistry, Faculty of Marine Science, Chabahar Maritime University, P.O. Box 98617-85553 Chabahar, I.R. IRAN

Abstract

A novel molecularly imprinted polymer-coated stir bar has been used to selectively extract diclofenac (DFC) directly from real samples. DFC was used as template molecule for preparation of MIP coating. The effect of different parameters on the extraction efficiency were studied and the optimum conditions were established as: the absorption and desorption times were fixed at 10 min, stirring speed was 600 rpm, pH was adjusted to 5.1, the amount of NaCl was 0.35 mol/L and extraction process was performed at a temperature of 45 °C. Under the optimum conditions, the linear range of method was 0.5- 500.0 µg/L for DFC and the detection limit was calculated to be 0.15 µg/L with an enrichment factor of 242 folds. The technique was successfully applied for the analysis of trace amounts of DFC in seawater and commercial tablet samples. The mean recoveries of spiking real samples with DFC at 10.0 µg/L level were between 94.2-100.0 % with a mean RSD of 0.7-4.6%.

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Main Subjects

References

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Iranian Journal of Chemistry and Chemical Engineering
Volume 38, Issue 1 - Serial Number 93
January and February 2019
Pages 173-183

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