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Recovery rates for trolox standard addition to a tea sample.
| Sample | Trolox added (×10−4 mol·L−1) | Trolox found (×10−4 mol·L−1) | Recovery (%) | |||
|---|---|---|---|---|---|---|
| DPV | Spectrophotometry | DPV | Spectrophotometry | DPV | Spectrophotometry | |
| Addition 1 | 2 | 2 | 1.954 | 2.059 | 97.692 | 102.941 |
| Addition 2 | 3 | 3 | 3.023 | 2.864 | 100.769 | 95.466 |
| Addition 3 | 4 | 4 | 4.077 | 3.882 | 101.925 | 97.059 |
| Addition 4 | 5 | 5 | 4.958 | 5.118 | 99.160 | 102.353 |
| Addition 5 | 6 | 6 | 6.130 | 6.235 | 101.166 | 103.922 |
