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| Sample | Cr(vi) (mg L−1) | Cr(vi) spiked (mg L−1) | Cr(vi) found (mg L−1) | R% |
|---|---|---|---|---|
| Tap water | N.D. | 60 mg L−1 | 0.1172 | 99.8 |
| Raw water | N.D. | 60 mg L−1 | 0.9323 | 98.4 |
N.D.: not detected.
