Table 2.

Comparison of analytical characteristics of biosensors based on urease adsorbed on silicalite-1-covered transducers

Biosensor characteristic	Biosensors based on transducers covered via spin coating	Biosensors based on transducers covered via drop coating
Time of steady-state response	1 min	1.5 to 2 min
Sensitivity to urea, μS/mM	700 to 860	1,100 to 1,500
Linear range, μM	10 to 1,000	2 to 700
Limit of urea detection, μM	5 to 10	1 to 2
Reproducibility of responses during working day (RSD)	3% to 8%	2% to 4%
Reproducibility of biosensor preparation (RSD of responses of different biosensors)	12% to 15%	20% to 25%