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Recoveries of chlorhexidine in three different pooled sludge samples (N = 3) with different addition levels
| Pooled sludge sample | Recoveries (%) | ||
|---|---|---|---|
| Addition level: 2000 ng g−1 | Addition level: 1000 ng g−1 | Addition level: 500 ng g−1 | |
| 1 | 109 ± 2% | 94 ± 11% | 101 ± 6% |
| 2 | 120 ± 6% | 101 ± 5% | 115 ± 8% |
| 3 | 97 ± 4% | 96 ± 5% | 112 ± 8% |
| Average | 109 ± 4% | 97 ± 7% | 109 ± 7% |
| Grand mean | 105 ± 6% | ||
