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| adsorbent | pH 4 | pH 5 | pH 6 |
|---|---|---|---|
| XAD-4 | (44.0 ± 2.3)% | (39.9 ± 1.5)% | (36.2 ± 2.6)% |
| XAD-7 | (39.3 ± 1.9)% | (35.8 ± 2.2)% | (32.1 ± 1.2)% |
| XAD-761 | (31.1 ± 2.1)% | (28.5 ± 3.1)% | (25.2 ± 2.1)% |
