Figure 3From: Nano- and microsized zeolites as a perspective material for potentiometric biosensors creation Calibration curves of biosensors. They were based on immobilized urease without zeolite (1) and urease with zeolite: BEA-30 (2), BEA-40 (3), BEA-50 (4), LTA-4 (5), LTA-9 (6), and LTA-22 (7). Zeolite concentrations are 1.5% (a) and 8.2% (b). Measurements were conducted in 2.5 mM phosphate buffer, pH 6.4.Back to article page