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. 2022 Nov 12;8(11):e11586. doi: 10.1016/j.heliyon.2022.e11586

Table 3.

Oxygenated functional groups quantification (meq·g−1) on the samples surface obtained by titrations.

Sample Carboxyl Lactones Phenols
ACC 0.075 0.124 N/D
CCSOx 0.071 0.119 N/D
ACC15m 0.242 0.299 0.043
CC15m 0.225 0.288 0.041
ACC2h 0.398 0.376 0.108
CC2h 0.371 0.365 0.101

∗ND: Not detectable.