Enhancement of Congo Red-Neomycin Resonance Rayleigh Scattering by Dodecyl Trimethyl Ammonium Bromide and its Application

Figure 2

Resonant Rayleigh scattering spectra of different systems. 1 mL pH 6.0 Britton-Robinson buffer solution, 1: DTAB; 2: congo red; 3: neomycin 4: neomycin-DTAB; 5: congo red-DTAB; 6: congo red- neomycin; and 7: congo red-neomycin-DTAB. The concentrations of the added substances were 1.0 × 10⁻⁵ mol·L⁻¹ for DTAB, 1.5 × 10⁻⁵ mol·L⁻¹ for congo red, 1.0 μg·mL⁻¹ for neomycin.