Table 4.
Quantitative determination of three phenolic acids in 18 samples of C. paliurus leaves a.
| Sample No. | Content (mg g−1) | |||
|---|---|---|---|---|
| 3-O-Caffeoylquinic Acid | 4-O-Caffeoylquinic Acid | 4,5-di-O-Caffeoylquinic Acid | TPC b | |
| S1 | 0.50 ± 0.03j | 0.15 ± 0.00i | 0.11 ± 0.00l | 0.77 ± 0.04h |
| S2 | 0.52 ± 0.00j | 0.21 ± 0.01h | 0.17 ± 0.00hi | 0.91 ± 0.00g |
| S3 | 0.80 ± 0.04hi | 0.32 ± 0.01fg | 0.22 ± 0.01f | 1.34 ± 0.07f |
| S4 | 0.82 ± 0.00ghi | 0.11 ± 0.01j | 0.08 ± 0.00m | 1.01 ± 0.01g |
| S5 | 1.31 ± 0.00d | 0.29 ± 0.01g | 0.30 ± 0.01d | 1.90 ± 0.02c |
| S6 | 0.89 ± 0.02fg | 0.37 ± 0.01e | 0.25 ± 0.00e | 1.52 ± 0.02e |
| S7 | 1.54 ± 0.01b | 0.50 ± 0.02c | 0.62 ± 0.00b | 2.66 ± 0.03b |
| S8 | 1.42 ± 0.01c | 0.67 ± 0.00a | 0.63 ± 0.03b | 2.71 ± 0.02b |
| S9 | 1.00 ± 0.01e | 0.34 ± 0.02f | 0.32 ± 0.02c | 1.66 ± 0.04d |
| S10 | 0.78 ± 0.04i | 0.31 ± 0.02g | 0.18 ± 0.00hi | 1.27 ± 0.11f |
| S11 | 1.00 ± 0.05e | 0.22 ± 0.01h | 0.14 ± 0.01jk | 1.37 ± 0.07f |
| S12 | 0.94 ± 0.00ef | 0.44 ± 0.02d | 0.21 ± 0.00fg | 1.60 ± 0.01de |
| S13 | 0.46 ± 0.00j | 0.12 ± 0.00j | Trace c | 0.58 ± 0.01i |
| S14 | 0.92 ± 0.01ef | 0.22 ± 0.00h | 0.16 ± 0.01ij | 1.31 ± 0.06f |
| S15 | 0.81 ± 0.04ghi | 0.30 ± 0.01g | 0.19 ± 0.01gh | 1.31 ± 0.09f |
| S16 | 0.89 ± 0.03fgh | 0.13 ± 0.00ij | 0.22 ± 0.00f | 1.25 ± 0.03f |
| S17 | 2.34 ± 0.00a | 0.62 ± 0.03b | 0.66 ± 0.01a | 3.61 ± 0.01a |
| S18 | 0.54 ± 0.03j | 0.22 ± 0.01h | 0.12 ± 0.01kl | 0.88 ± 0.08gh |
a Data are expressed as mean ± SD of duplicate experiments. Different letters indicate significant differences among the C. paliurus from different geographic regions in phenolic acid content (p ≤ 0.05 by Duncan’s test); b TPC: contents of total three phenolic acids; c Trace: under quantification limit (LOQ).