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Analytical and Bioanalytical Chemistry

, Volume 411, Issue 5, pp 1075–1084 | Cite as

Entacapone detection by a GOQDs-molecularly imprinted silica fluorescent chemical nanosensor

  • Hamed Ahmadi
  • Farnoush FaridbodEmail author
  • Mina Mehrzad-Samarin
Research Paper
First Online:

Abstract

A sensitive fluorescent chemical nanosensor for the detection of entacapone (EN) in pharmaceutical samples is introduced. EN is a nitrocatechol drug that functions as a selective and reversible inhibitor of catechol-O-methyl transferase and is widely prescribed in the treatment of Parkinson disease. Molecularly imprinting technology and graphene oxide quantum dots (GOQDs) were employed in designing the EN fluorescent nanosensor. GOQDs were embedded into an inorganic polymer while the imprinting process occurred. The synthesized GOQDs-embedded silica molecularly imprinting polymer (SMIP) showed strong fluorescent emission at 450 nm by exciting at 360 nm. The fluorescence intensity of GOQDs-embedded SMIP was quenched effectively by adsorption of EN as a template molecule. The quenching corresponded to EN concentration in a linear range of at least 0.40–6.00 μM with a limit of detection of 0.31 μM. The designed chemical nanosensor was successfully applied to the analysis of entacapone in some pharmaceutical tablets also containing carbidopa and levodopa (RSD 3.8%).

Keywords

Entacapone Nanosensor Fluorescence detection Graphene quantum dots Inorganic molecularly imprinted polymer 
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Notes

Acknowledgements

The authors are grateful to the Research Council of University of Tehran for the financial support of this work.

Compliance with ethical standards

This research was performed in accordance with the Declaration of Helsinki and with approval of the ethics board of the University of Tehran. Human plasma sample used in this work was from a healthy volunteer with O-positive blood who signed an informed consent form in the Iranian Blood Transfusion Center. It was a fresh frozen plasma (Product Code: E070V00).

Conflict of interest

The authors declare that they have no conflicts of interest.

Supplementary material

216_2018_1534_MOESM1_ESM.pdf (143 kb)
ESM 1 (PDF 142 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Analytical Chemistry Department, School of Chemistry, College of ScienceUniversity of TehranTehranIran

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