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Spectrophotometric determination (n = 5) with the proposed method of iron amount in different CRMs.
| Certified Iron Concentration (μg/L) | Measured Iron Concentration (μg/L) | Recovery (%) | |
|---|---|---|---|
| NIST SRM 1643f Natural Water | 93.4(0.8) | 95(1) | 102 |
| ClinChek® Control Human Urine Level II | 222 | 215(2) | 97 |
| ClinChek® Control Blood Serum Level I | 905 | 935(7) | 103 |
