Fig. 5 | Heritage Science

Fig. 5

From: A diagnostic tool for assessing the conservation condition of cellulose nitrate and acetate in heritage collections: quantifying the degree of substitution by infrared spectroscopy

Fig. 5

Infrared spectrum of a historical cellulose acetate film from the San Payo collection (SP594), plasticized with triphenyl phosphate and diethyl phthalate. The spectra of the two plasticizers are shown for comparison, left. DS calibration curves and respective equations and coefficients of determination (R2) for the polynomial fitting of the νOH/νCOC ratios calculated from µ-FTIR and ATR-FTIR, right

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