Effect of different modifications of BEA-zeolites on operational characteristics of conductometric biosensor

Kucherenko I. S., Soldatkin O. O., Soy E., Kirdeciler K., ÖZTÜRK S., AKATA KURÇ B., ...Daha Fazla

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, cilt.32, sa.6, ss.1648-1653, 2012 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 6
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.msec.2012.04.056
  • Dergi Adı: MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1648-1653
  • Anahtar Kelimeler: Zeolite, Conductometric transducer, Biosensor, Urease, Urea, BETA, IMMOBILIZATION, MONOLAYERS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Effect of different modifications of zeolite Na+-BEA on working characteristics of urease-based conductometric biosensor was studied. As the biosensor sensitive elements were used bioselective membranes based on urease and various zeolites immobilised with bovine serum albumin on the surface of conductometric transducers. Influence of zeolites on sensitivity of urea biosensor was investigated as well as reproducibility of biosensor signal and reproducibility of activity of the bioselective element after different variants of urease immobilisation on the surface of conductometric transducer. The biosensors based on zeolites (NH4+-BEA 30 and H+-BEA 30) were shown to be the most sensitive. Concentration of these zeolites in the bioselective membrane was optimized. Use of zeolites modified with methyl viologen and silver was ascertained to be of no prospect for urea conductometric biosensors. It was demonstrated that characteristics of urea biosensors can be regulated, varying zeolites modifications and their concentrations in bioselective membranes. (c) 2012 Elsevier B.V. All rights reserved.