Magnetic Fe₃O₄/Ag Hybrid Nanoparticles as Surface-Enhanced Raman Scattering Substrate for Trace Analysis of Furazolidone in Fish Feeds

Figure 5

(a) Representative SERS spectra of 500 ng mL⁻¹ furazolidone molecules adsorbed on (A) FA-1, (B) FA-2, (C) FA-3, and (D) FA-4; (b) Raman intensity of 500 ng mL⁻¹ and 100 ng mL⁻¹ furazolidone at 1348 cm⁻¹ (𝑛=5).

(a)

(b)