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. 2022 Feb 1;13:100236. doi: 10.1016/j.fochx.2022.100236

Table 3.

Kinetics parameters of thermal stability of anthocyanin-rich extracts obtained by PLE using different solvents: water, acidified water or natural deep eutectic solvents (ChCl:Pro or ChCl:Ma).

kd (min−1) RSS R2 R2adj t1/2 (h)
60 °C
Water 0.0025 0.0686 0.7746 0.7746 4.6582
Acidified water 0.0015 0.0261 0.8829 0.8829 7.6506
ChCl:Pro 0.0020 0.0603 0.7859 0.7859 5.6630
ChCl:Ma 0.0012 0.0525 0.7624 0.7624 9.7902
70 °C
Water 0.0031 0.0932 0.7953 0.7953 3.7630
Acidified water 0.0020 0.0393 0.9087 0.9087 5.8642
ChCl:Pro 0.0020 0.0451 0.8257 0.8257 5.6630
ChCl:Ma 0.0017 0.0565 0.8594 0.8594 6.7165
80 °C
Water 0.0064 0.0196 0.98258 0.98258 1.7939
Acidified water 0.0051 0.0703 0.93422 0.93422 2.2741
ChCl:Pro 0.0049 0.0218 0.97693 0.97693 2.3433
ChCl:Ma 0.0047 0.0328 0.97062 0.97062 2.4424
90 °C
Water 0.0121 0.0305 0.9784 0.9784 1.1097
Acidified water 0.0104 0.0292 0.9812 0.9812 0.9540
ChCl:Pro 0.0098 0.0366 0.9763 0.9763 1.1764
ChCl:Ma 0.0091 0.0354 0.9737 0.9737 1.2695
100 °C
Water 0.0260 0.0682 0.9647 0.9647 0.4440
Acidified water 0.0166 0.0210 0.9878 0.9878 0.6943
ChCl:Pro 0.0231 0.0030 0.9986 0.9986 0.5012
ChCl:Ma 0.0212 0.0057 0.9973 0.9973 0.5439

Note: PLE – pressurized liquid extraction, kd – degradation rate, RSS: residual sum of squares, R2 - determination coefficient, R2adj - adjusted determination coefficient, t1/2 - time of half-live, ChCl - choline chloride, Pro-propylene glycol, Ma - malic acid.