Fig. 2

Infrared spectra of a celluloid reference and camphor left. DS linear calibration curves for µFTIR and ATR-FTIR and respective equations and coefficients of determination (R2), right. For more details, see the text

Infrared spectra of a celluloid reference and camphor left. DS linear calibration curves for µFTIR and ATR-FTIR and respective equations and coefficients of determination (R2), right. For more details, see the text