Development of Silicalite/Glucose Oxidase-Based Biosensor and Its Application for Glucose Determination in Juices and Nectars

Dudchenko O. Y., Pyeshkova V. M., Soldatkin O. O., AKATA KURÇ B., Kasap B. O., Soldatkin A. P., ...More

NANOSCALE RESEARCH LETTERS, vol.11, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11
  • Publication Date: 2016
  • Doi Number: 10.1186/s11671-016-1275-2
  • Journal Name: NANOSCALE RESEARCH LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Enzyme immobilization, Silicalite, Glucose oxidase, Conductometric transducer, Biosensor, FIELD-EFFECT TRANSISTORS, IMMOBILIZED UREASE, ZEOLITES
  • Middle East Technical University Affiliated: Yes

Abstract

The application of silicalite for improvement of enzyme adsorption on new stainless steel electrodes is reported. Glucose oxidase (GOx) was immobilized by two methods: cross-linking by glutaraldehyde (GOx-GA) and cross-linking by glutaraldehyde along with GOx adsorption on silicalite-modified electrode (SME) (GOx-SME-GA). The GOx-SME-GA biosensors were characterized by a four-to fivefold higher sensitivity than GOx-GA biosensor. It was concluded that silicalite together with GA sufficiently enhances enzyme adhesion on stainless steel electrodes. The developed GOx-SME-GA biosensors were characterized by good reproducibility of biosensor preparation (relative standard deviation (RSD)-18 %), improved signal reproducibility (RSD of glucose determination was 7 %), and good storage stability (29 % loss of activity after 18-day storage). A series of fruit juices and nectars was analyzed using GOx-SME-GA biosensor for determination of glucose concentration. The obtained results showed good correlation with the data of high-performance liquid chromatography (HPLC) (R = 0.99).