Individual and Simultaneous Electrochemical Determination of Vanillin and Caffeine Using Nafion/Ethylenediamine Grafted Multi-walled Carbon Nanotubes Modified Boron-doped Diamond Electrode

Baroogh B. H., Avan A. A., Filik H., Yalcin S.

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, cilt.17, sa.12, 2022 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17 Sayı: 12
  • Basım Tarihi: 2022
  • Doi Numarası: 10.20964/2022.12.75
  • Dergi Adı: INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Vanillin, Caffeine, boron-doped diamond electrode, ethylenediamine, multi-walled carbon nanotubes, electrochemical sensor, TOTAL CHLOROGENIC ACIDS, VOLTAMMETRIC DETERMINATION, NAFION COATINGS, SPECTROSCOPY, OXIDATION, SENSOR, FOODS
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

A boron-doped diamond electrode (BDDE) modified with Nafion-ethylenediamine grafted multiwalled carbon nanotubes (EDA-MWCNTs) composite was fabricated for the simultaneous quantification of Vanillin (VAN) and Caffeine (CAF). Firstly, the MWNTs are functionalized with acyl chloride groups, which further react with EDA to form amine-functionalized MWCNTs. The experimental findings showed that the modified BDDE had high activity for the electrochemical oxidation of both compounds. In 0.10 M H2SO4, the linear range for the detection of binary mixtures of VAN and CAF with square wave voltammetry (SWV) was 0.4-40 mu M and the reached detection limits were 0.15 mu M and 0.18 mu M (LOD =3SD/m), respectively. The modified BDDE was successfully utilized to establish VAN and CAF in different samples with recoveries range of 94%-102% and 95%-100%, respectively.