A Versatile SERS Sensor for Multiple Determinations of Polycyclic Aromatic Hydrocarbons and Its Application Potential in Analysis of Fried Foods

Figure 4

(a) The SERS spectra of PYR with different concentrations in the presence of rGO/AuNP; (b) fitting results of peak intensity (I) and concentration (C) based on different characteristic peaks. (I) Linear regression with the characteristic peak at  = 594 cm⁻¹; (II) linear regression with the characteristic peak at  = 1234 cm⁻¹; (III) linear regression with the characteristic peak at  = 1400 cm⁻¹; (IV) linear regression with the intensity ratio between  = 1234 cm⁻¹ and  = 1020 cm⁻¹; (V) binary linear regression with the characteristic peak at  = 1234 cm⁻¹ and  = 1400 cm⁻¹.

(a)

(b)