A Sensitive Resonance Rayleigh Scattering Method for Na⁺ Based on Graphene Oxide Nanoribbon Catalysis

Figure 4

SEM of the analysis system. a:1.13 mol/L CH₃CH₂OH+ 3.14 μmol/L PA+0.193 mmol/L HAuCl₄ +3.3 mmol/L H₂O₂+23.8 ng/mL GONR; b:a+17.2 nmol/L Na⁺.

(a)

(b)