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Table 1 Analytical features of the three spectral methods

From: SERS Detection of Dopamine Using Label-Free Acridine Red as Molecular Probe in Reduced Graphene Oxide/Silver Nanotriangle Sol Substrate

Method Regress equation Linear range (μmol/L) Coefficient Detection limit (μmol/L)
SERS ΔI=1.80C + 48 2.5–500 0.995 1.2
Fluoa(Fig. 3(e–j)) ΔF552nm = 0.59C + 51 50–500 0.923 25
Abs (Fig. 5) ΔA280nm = 0.0018C−0.03 25–500 0.996 12
  1. Abs absorption method
  2. aFluorescence method