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. 2022 Jul 15;23(14):7832. doi: 10.3390/ijms23147832

Figure 1.

Figure 1

The FTIR spectra of caffeine precipitates after solubility measurements in NADES (choline chloride + glycerol), water and their mixtures. Values in parentheses indicate the mole fractions of ccNADES in solute-free solutions. For comparison, the spectrum of pure caffeine is presented.