Figure 6From: Study of zeolite influence on analytical characteristics of urea biosensor based on ion-selective field-effect transistorsReproducibility of responses to the 0.5 mM urea obtained with biosensors created by different methods of urease immobilization. In GA vapour (1), adsorption on the surface of transducer covered with monolayer of: silicalite (2), nano beta zeolite (3), zeolite L (4) and calcinated nano beta zeolite (5). The measurements were carried out in 5 mM phosphate buffer solution (pH 7.4).Back to article page