Fig. 5
From: Quantitative Analysis of Single and Mix Food Antiseptics Basing on SERS Spectra with PLSR Method
a The black, blue, and red lines represent Raman spectra of PS solution, mixture solution contained 10 mg/L PS and 10 mg/L SB, and SB solution measured with SERS substrates, respectively, and the pink and blue rectangles mark the characteristic peak sections of PS and SB employed to calibrate PLSR model, respectively; b PS concentration predicted by the PLSR model established with Raman spectrum data corresponding to PS characteristic peaks; c difference between predicted PS concentration of each mixture solution and average predicted PS concentration of solution with the same PS concentration; d PS concentration in test solution with the composition as Table 1 shows predicted by the PLSR model corresponding to PS