Electrochemical determination of amaranth in food samples by using modified electrode

Original scientific paper


  • Sayed Zia Mohammadi Department of Chemistry, Payame Noor University, Tehran, Iran https://orcid.org/0000-0001-6980-9121
  • Yar-Mohammad Baghelani Department of Chemistry, Faculty of Sciences, Ilam University, Ilam, Iran https://orcid.org/0000-0001-5347-1744
  • Farideh Mousazadeh School of Medicine, Bam University of Medical Sciences, Bam, Iran
  • Shamsi Rahimi Department of Chemistry, Payame Noor University, Tehran, Iran
  • Maryam Mohammad-Hassani Department of Chemistry, Payame Noor University, Tehran, Iran https://orcid.org/0000-0001-6980-9121




Electrochemical sensor, carbon paste electrode, activated carbon-Co3O4 nanocomposite


In this paper, a new electrochemical sensor was reported for the determination of amaranth in drink soft. In this sensor, activated carbon-Co3O4 nanocomposite (AC-Co3O4) was employ­ed as electrode modifying material. High pores of the activated carbon favour an access of aramanth nolecules within the pores of  the working electrode surface, and allow  fast electron transfer that is beneficial for the  electrochemical detecion process. Thus, the electrochemical signal is obviously enhanced at AC-Co3O4 modified electrode compared to bare carbon paste electrode, and exhibited a wide linear response ranging from 0.1-215 mM with a low detection limit of 10.0 nM (based on 3Sb/m). This work offers a new route in developing new electro­chemical sensors for the determination of collorant additives and other hazard components in drink soft.


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