Figure 6From: Nano- and microsized zeolites as a perspective material for potentiometric biosensors creation Calibration curves (a) and sensor response to 6 mM urea (b). Results were obtained in the absence of clinoptilolite (1). With addition of clinoptilolite of different concentrations to biomembranes: 1% (2); 5% (3); 10% (4); and 15% (5). Measurements were conducted in 5 mM phosphate buffer, pH 7.2.Back to article page