Table 1.

The sensitivity, linear range and detection limit of enzyme biosensors were tested on the first, seventh, 15th and 22nd days.

Days	Analytical Characteristics	NAF/LAC	TiO2/LAC	TiO2/NAF/LAC
1	Sensitivity (µA·L/µmol)	2.6	2.71	2.94
	Linear Range/µM	1.25–150	1.25–150	0.75–150
	Detection limit/µM	1.25	1.25	0.75
	R2	0.9944	0.9986	0.9966
7	Sensitivity (µA·L/µmol)	2.78	2.62	2.85
	Linear Range/µM	2.5–125	2.5–150	1.25–150
	Detection limit/µM	2.5	2.5	1.25
	R2	0.951	0.9962	0.9988
15	Sensitivity (µA·L/µmol)	2.6	2.4	2.8
	Linear Range/µM	5–150	15–150	1.25–100
	Detection limit/µM	5	3.75	1.25
	R2	0.9993	0.9958	0.9966
22	Sensitivity (µA·L/µmol)	2.12	1.92	2.5
	Linear Range/µM	5–150	3.75–150	3.75–150
	Detection limit/µM	5	3.75	3.75
	R2	0.9973	0.9988	0.9980