Limit of detection value (LOD) for Bio I, III and IV.

Entry	Sample	LODa (μM)
		ABTS	Dopamine
1	HRP–GOXb	5.43	2.39
2	Con A/HRP–GOX	5.10	3.25
3	Bio I	3.90	1.20
4	Bio III	1.71	1.14
5	Bio IV	1.21	0.85

^aThe LOD was evaluated as reported in literature.⁷⁸

^bHomogeneous HRP–GOX mixture (same ratio value than that used for the Bio systems).