Table 4 Results of analysis of water CRM trace metals 1-WP QC11132 (Sigma Aldrich)
Element | Found value (μg L−1) | s(μg L−1) | Certified value (μg L−1) | UCRM(μg L−1) | Recovery (%) |
|---|---|---|---|---|---|
Cd | 390 | 3.10 | 385 | 5.07 | 101 |
Cr | 862 | 25.7 | 864 | 11.6 | 99.8 |
Cu | 592 | 8.00 | 603 | 7.80 | 98.2 |
Fe | 1,350 | 27.0 | 1,340 | 24.4 | 101 |
Al | 452 | 12.9 | 463 | 11.4 | 97.6 |
Pb | 908 | 30.2 | 929 | 14.4 | 97.7 |
Mn | 1,200 | 7.15 | 1,200 | 15.5 | 100 |
Ni | 1,730 | 21.1 | 1,710 | 20.4 | 101 |
Zn | 918 | 8.04 | 915 | 16.2 | 100 |
As | 414 | 7.25 | 416 | 8.25 | 99.5 |