Label-Free Detection of Chondroitin Sulphate Proteoglycan 4 by a Polyaniline/Graphene Nanocomposite Functionalized Impedimetric Immunosensor

Table 1

Comparison of impedimetric immunosensor and ELISA.

	Reagent consumption	Labeled antibodies	Assay time	Point-of-care potential
Impedimetric immunosensor	~5 L	No	~2 h	High
ELISA	100–200 L	Yes	6~8 h	Less