Fig. 2

(A) FT-MIR spectra of bromoform standards (n = 12); (B) FT-MIR spectra of bromoform extracts (n = 35); (C) wavelength variables (N = 22) with high iteration numbers selected from the FT-MIR spectral data of bromoform standards (n = 12) using rPLS for PLSR modelling; (D) scatter plot and regression fit-line of the PLSR model developed based on selected FT-MIR spectral variables (LVs = 4) of bromoform standards (n = 12) on measured bromoform content vs. cross-validated bromoform content; (E) wavelength variables (N = 22) with high iteration numbers selected from FT-MIR spectral data of bromoform extracts (n = 35) using rPLS for PLSR modelling; (F) scatter plot and regression fit-line of PLSR model developed based on selected FT-MIR spectral variables (LVs = 9) of bromoform extracts (n = 35) on measured bromoform content vs. cross-validated bromoform content.