| Concentration (μg/mL) | Instruments | Dieckol content (mg/g) | Average content (mg/g) | SD (mg/g) | RSD (%) | |
| Itermediate assay | 94.56231 | Agilent 1260 | 73.930 | 74.453 | 0.920 | 1.236 |
| 97.25632 | Agilent 1260 | 75.057 | ||||
| 93.42563 | Agilent 1260 | 73.044 | ||||
| 98.62358 | Agilent 1200 | 75.384 | ||||
| Phlorotannin sample (mg) | Concentration (μg/mL) | Dieckol content (mg/g) | Average content (mg/g) | SD (mg/g) | RSD (%) | |
| Intra-day: Agilent 1260 Infinitya | 56.5 | 96.10084 | 74.1592 | 73.9297 | 0.761 | 1.030 |
| 59.4 | 101.08464 | 74.1968 | ||||
| 58.3 | 97.25135 | 72.7300 | ||||
| 56.6 | 95.55534 | 73.6080 | ||||
| 57.9 | 99.64617 | 75.0358 | ||||
| 52.7 | 89.26187 | 73.8485 |