Polycyclodextrin and carbon nanotubes as composite for tyrosinase immobilization and its superior electrocatalytic activity towards butylparaben an endocrine disruptor

Jahangir Ahmad Rather, Sanaz Pilehvar, Karolien De Wael

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We developed a protocol for the immobilization of tyrosinase (Tyr) on the composite of polycyclodextrin polymer (CDP) and carbon nanotubes for the detection of an endocrine disruptor, i.e., butylparaben (BP). The formation of the CDP polymer was characterized by UV-Vis spectrophotometry. The conducting film of cross-linked CDP and carbon nanotubes, displays excellent matrix capabilities for Tyr immobilization. The host-guest chemical reaction ability of CD and the -π -π- stacking interaction assure the bioactivity of Tyr towards butylparaben. The developed biosensor was characterized electrochemically by electrochemical impedance spectroscopy. The enzyme-substrate kinetic parameters such as the apparent Michaelis-Menten constant (K app M ) was measured under saturated substrate concentration. The determination of butylparaben was carried out by using square wave voltammetry over the concentration range of 2.1 to 35.4 μM with a detection limit of 0.1 μ. The fabricated biosensor was successfully applied in real-life cosmetic samples with good recovery ranging from 98.5 to 102.8%.

Original languageEnglish
Pages (from-to)3365-3372
Number of pages8
JournalJournal of Nanoscience and Nanotechnology
Volume15
Issue number5
DOIs
Publication statusPublished - May 1 2015

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Keywords

  • Biosensor
  • Butylparaben (Bp)
  • Polycyclodextrin polymer (Cdp)
  • Tyrosinase (Tyr)

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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