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- W3176192802 abstract "• Prussian blue (PB) based impedimetric urea biosensor was designed. • FTO was modified by Prussian blue and immobilized urease (glass/FTO/PB/urease biosensor). • Sensitivity of the glass/FTO/PB/urease biosensor is 2.55 Ω cm 2 mM −1 . • The glass/FTO/PB/urease biosensor exhibits linear range from 0.1 mM to 5.4 mM. • Acidic conditions improve PB stabilisation in ammonium ion containing medium. In this research an impedimetric urea biosensor was formed by modifying a fluorine doped tin oxide coated glass slide (glass/FTO) with a layer of PB (glass/FTO/PB), which was further stabilized in ammonium ion-containing medium, and immobilizing urease (glass/FTO/PB/urease) with vapor of glutaric aldehyde. Fast Fourier transform electrochemical impedance spectroscopy (FFT-EIS) investigation of the glass/FTO/PB/urease-based biosensor in urea-containing buffer solution indicated that the glass/FTO/PB/urease-based biosensor exhibits good sensitivity to urea (2.55 Ω cm 2 mM −1 ) and a range of linearly detectable concentrations of urea from 0.1 mM to 5.4 mM (R 2 = 0.992). To determine the optimal conditions of PB layer stabilisation, the influence of acidity of NH 4 Cl solution on the efficiency of cyclic voltammetry-based stabilization of PB layer was investigated in this research as well." @default.
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- W3176192802 date "2021-08-01" @default.
- W3176192802 modified "2023-10-17" @default.
- W3176192802 title "Prussian blue based impedimetric urea biosensor" @default.
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- W3176192802 doi "https://doi.org/10.1016/j.jelechem.2021.115473" @default.
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