Table 3.
Free radical scavenging capacity of chamomile essential oil (CEO) determined with the DPPH assay.
| Agent | Concentration(mg/mL) | Absorbance OD (517 nm) | Absorbance Inhibition (%) |
|---|---|---|---|
| DPPH | 0.04 | 1.059 ± 0.001 | |
| α-cariophylene | 100 | 1.048 ± 0.009 | 1.0 |
| α-tocopherol | 1 | 0.362 ± 0.015* | 65.8 |
| CEO | 5 | 1.057 ± 0.003 | 0.001 |
| CEO | 10 | 1.013 ± 0.004* | 4.3 |
| CEO | 50 | 0.872 ± 0.014* | 17.6 |
| CEO | 100 | 0.621 ± 0.022* | 41.3 |
| CEO | 500 | 0.208 ± 0.013* | 80.4 |
*
Statistically significant difference with respect to the value obtained with DPPH. ANOVA and Student t tests, p < 0.05. % inhibition = 1 − (OD value of experimental group/OD value of DPPH group) × 100.