Microchimica Acta

, 186:420 | Cite as

A screen-printed electrode modified with tungsten disulfide nanosheets for nanomolar detection of the arsenic drug roxarsone

  • Mani GovindasamyEmail author
  • Sea-Fue WangEmail author
  • R. JothiramalingamEmail author
  • S. Noora Ibrahim
  • Hamad A. Al-lohedan
Original Paper


A sensitive electrochemical (voltammetric; DPV) sensor has been developed for the determination of coccidiostat drug (roxarsone) based on the use of an SPCE (screen-printed carbon electrode) modified with tungsten disulfide nanosheets (WS2 NSs). The electrochemical detection of roxarsone on the WS2-modified SPCE was examined by electrochemical strategies. XPS, XRD, Raman, SEM, TEM, EDS and EIS were used to characterize the nanosheets. The effects of scan rate, pH values (phosphate buffer) and buffer concentration were optimized. A selective roxarsone sensor was developed that works best at -0.64 V (vs. Ag/AgCl) and performs much better than the bare SPCE. Features include (a) a wider linear range (0.05 to 490 μM), (b) a nanomolar detection limit (0.03 μM) and (c) high sensitivity (29 μA·μM-1·cm-2). The modified SPCEs have been successfully applied to the determination of roxarsone in spiked meat samples where they gave high accuracy and good recoveries.

Graphical abstract

Synthesis of WS2 nanosheets and electrochemical detection of roxarsone.


Food safety Toxic drugs Modified electrode Metal dichalcogenides Nanosheets Electrochemical detection Organo-arsenic drug detection Feed additive detection 



Financial assistance received from National Taipei University of Technology is gratefully acknowledged. One of the author Dr. Govindasamy Mani would like to gratitude National Taipei University of technology for the post-doctoral fellowship. The authors (R. Jothiramalingam, King Saud University, Saudi Arabia) extend their appreciation to Research & Development Office-Ministry of Education for funding this research work, through the High Quality and Impact Research Initiative. Saudi Arabia.

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2019_3535_MOESM1_ESM.docx (2.3 mb)
ESM 1 (DOCX 2.30 MB)


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Copyright information

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

Authors and Affiliations

  1. 1.Department of Materials and Mineral Resources EngineeringNational Taipei University of TechnologyTaipeiTaiwan
  2. 2.Chemistry Department, College of ScienceKing Saud UniversityRiyadhSaudi Arabia

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