2.3. FTIR ATR measurements
ATR spectra were recorded using a single reflection Golden Gate (Specac, Slough, UK) diamond accessory mounted in the Nicolet iS50 FTIR spectrometer (Thermo Fisher Scientific, Madison, WI, USA). A KBr beamsplitter and DTGS detector were used for infrared measurements. The spectra of milk samples in the 400–4000 cm−1 range with a resolution of 4 cm−1 were obtained (128 scans). Similar to Raman experiments, Happ-Genzel apodization and Fourier transformation of interferograms using a zero filling factor of 2 were applied to obtain IR spectra. Under such conditions, it took approximately 2–3 min to register the spectrum. ATR measurements were performed in a similar manner to those described by Iñón et al. [4], though a single reflection diamond accessory was used instead of a 6-reflection ZnSe accessory.
2.3. FTIR ATR measurementsATR spectra were recorded using a single reflection Golden Gate (Specac, Slough, UK) diamond accessory mounted in the Nicolet iS50 FTIR spectrometer (Thermo Fisher Scientific, Madison, WI, USA). A KBr beamsplitter and DTGS detector were used for infrared measurements. The spectra of milk samples in the 400–4000 cm−1 range with a resolution of 4 cm−1 were obtained (128 scans). Similar to Raman experiments, Happ-Genzel apodization and Fourier transformation of interferograms using a zero filling factor of 2 were applied to obtain IR spectra. Under such conditions, it took approximately 2–3 min to register the spectrum. ATR measurements were performed in a similar manner to those described by Iñón et al. [4], though a single reflection diamond accessory was used instead of a 6-reflection ZnSe accessory.
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