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Solubility of ginger extract (GE) phenolics at various pH conditions.
| GE Phenolics | pH 2 a | pH 4 b | pH 7.4 c |
|---|---|---|---|
| 6G | >100 µM | >100 µM | >100 µM |
| 8G | >100 µM | >100 µM | >100 µM |
| 10G | <10 µM | <10 µM | <10 µM |
| 6S | <10 µM | <10 µM | <10 µM |
a pH 2: hydrochloride buffer; b pH 4: citrate buffer; c pH 7.4: phosphate buffer; 6G: 6-gingerol; 8G: 8-gingerol; 10G: 10-gingerol and 6S: 6-shogaol; n = 2.
