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| Sample no. | Concentration of Cr in the solution [μg mL−1] | Cr content in steel |
|---|---|---|
| 1 | 6.30 | 7.6% |
| 2 | 7.30 | 8.9% |
| 3 | 7.66 | 9.2% |
| 4 | 7.48 | 9.1% |
| 5 | 6.64 | 8.1% |
| Mean | 7.07 | 8.6% |
| RSD | 8.2% | 8.1% |
