| Polyvinylalcohol (mg/solid phase) | |||
Solid phase | 0 | 0.25 | 1.25 | 3.75 |
| Residual anthocyanin (% of total anthocyanin) | |||
Cotton swab® | 40.2 ± 2.2 | 45.6 ± 1.4 | 62.7 ± 3.8* | 66.9 ± 3.5* |
Inert polymer |
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Polypropyrene membrane | 44.5 ± 2.8 | 67.2 ± 6.8 | 80.0 ± 4.4* | 87.2 ± 9.0* |
Bell oasis® | 53.8 ± 7.8 | 87.3 ± 9.5 | 97.9 ± 6.8* | 101.7 ± 14.3* |