Research Article
Ultrasound-Assisted Extraction of Total Phenolic Compounds from Inula helenium
Table 1
Orthogonal design and experimental results.
| | No. | Ethanol concentration | Solid-liquid ratio | Number of extractions | Ultrasonic time | TPC (mg/g) | Chlorogenic acid (mg/g) |
| | 1 | 1 | 1 | 1 | 1 | 3.48 ± 0.38 | 0.89 ± 0.07 | | 2 | 1 | 2 | 2 | 2 | 5.81 ± 0.44 | 1.36 ± 0.12 | | 3 | 1 | 3 | 3 | 3 | 4.47 ± 0.41 | 1.02 ± 0.11 | | 4 | 2 | 1 | 2 | 3 | 5.01 ± 0.46 | 1.19 ± 0.14 | | 5 | 2 | 2 | 3 | 1 | 4.31 ± 0.41 | 0.98 ± 0.12 | | 6 | 2 | 3 | 1 | 2 | 3.53 ± 0.37 | 0.86 ± 0.06 | | 7 | 3 | 1 | 3 | 2 | 5.21 ± 0.47 | 1.29 ± 0.13 | | 8 | 3 | 2 | 1 | 3 | 4.23 ± 0.39 | 1.13 ± 0.09 | | 9 | 3 | 3 | 2 | 1 | 5.57 ± 0.52 | 1.39 ± 0.12 | | t | 4.59 | 4.56 | 3.75 | 4.45 | | | | t | 4.28 | 4.78 | 5.46 | 4.85 | | | | t | 5.00 | 4.52 | 4.46 | 4.57 | | | | 0.72 | 0.26 | 1.71 | 0.39 | | | | 1.09 | 1.12 | 0.96 | 1.09 | | | | 1.01 | 1.16 | 1.31 | 1.17 | | | | 1.27 | 1.09 | 1.10 | 1.11 | | | | 0.26 | 0.07 | 0.35 | 0.08 | | |
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: total phenolic compounds; : chlorogenic acid.
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