Table 2.
Concentration (mean ± standard deviation, n = 3) of flavanone glycosides, quaternary ammonium compounds, and limonoid aglycones in bergamot juice obtained using 3 different juice extraction methods: hand squeezing (Ep-1); FMC (Ep-2); screw press of peeled fruits (Ep-3), and in debittered bergamot juice (dBJ).
| Ep-1 | Ep-2 | Ep-3 | dBJ | |
|---|---|---|---|---|
| flavanone glycosides | ||||
| neoeriocitrin (mg/L) | 114 ± 20 a | 219 ± 64 b | 402 ± 122 c | 7 ± 2 d |
| narirutin (mg/L) | 18 ± 3.0 a | 18 ± 3.5 a | 37 ± 3.9 b | <0.1 |
| naringin (mg/L) | 97 ± 13 a | 175 ± 58 b | 394 ± 83 c | 5 ± 1 d |
| neohesperidin (mg/L) | 66 ± 15 a | 124 ± 69 b | 279 ± 78 c | 4 ± 2 d |
| Quaternary ammonium compounds | ||||
| N,N-dimethyl-L-proline (mg/L) | 436 ± 49 a | 569 ± 126 a | 667 ± 147a | 395 ± 38 a |
| limonoid aglycones | ||||
| Limonin (mg/L) | 20 ± 4 a | 37 ± 13 a | 65 ± 14 b | 5 ± 1 c |
| Nomilin (mg/L) | 17 ± 4 a | 42 ± 11 b | 67 ± 12 b | 3 ± 1 d |
Means in a row without a common superscript letter differ (p < 0.05) as analyzed by two-way ANOVA and the TUKEY test.