Voltammetric carbon nanotubes based sensor for determination of tryptophan in the milk sample

Mehmandoust M., ERK N., Alizadeh M., Salmanpour S.

JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION, cilt.15, sa.6, ss.5288-5295, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 6
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s11694-021-01100-8
  • Dergi Adı: JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, CAB Abstracts, Compendex, Food Science & Technology Abstracts, Veterinary Science Database
  • Sayfa Sayıları: ss.5288-5295
  • Anahtar Kelimeler: Tryptophan sensor, Carbon nanotube, Modified electrode, Food analysis, DIESEL-ENGINES PERFORMANCE, GRAPHENE QUANTUM DOTS, ELECTROCHEMICAL SENSOR, IONIC LIQUID, ACETAMINOPHEN, NANOCOMPOSITE, FABRICATION, BLENDS, ACID, FUEL
  • Ankara Üniversitesi Adresli: Evet

Özet

In this research, functionalized carbon nanotubes were employed to modify a glassy carbon electrode (F-MWCNT/GCE). Several techniques including Fourier Transform Infrared Spectroscopy, scanning electron microscopy, and transmission electron microscopy were utilized for characterization of F-MWCNT. The electrochemical activity of the developed electrode was assessed by differential pulse voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy. The electrochemical results demonstrated that oxidation of tryptophan (TRP) caused a higher anodic peak current than unmodified GCE. The F-MWCNT/GCE offered a detection limit of 3.63 nM and dynamic ranges of 0.01-0.7 mu M for analysis of TRP by the differential pulse voltammetry method. Moreover, tryptophan detection was achieved successfully using F-MWCNT/GCE in milk samples. It can be stated that this method paves the way for a selective, sensitive and straightforward method to determine tryptophan in the real food sample.