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

Figure 2

RRS spectra of CH₃CH₂OH-Na⁺-PA-GONR-H₂O₂-HAuCl₄ system. a:1.13 mol/L CH₃CH₂OH+ 3.14 μmol/L CAP+0.193 mmol/L HAuCl₄ +3.3 mmol/L H₂O₂+23.8 ng/mL GONR; b:a+0.69 nmol/L Na⁺; c:a+4.3 nmol/L Na⁺; d:a+8.6 nmol/L Na⁺; e:a+12.9 nmol/L Na⁺; f:a+17.2 nmol/L Na⁺; g:a+25.8 nmol/L Na⁺.