Table 5.
Elemental and isotopic results for Cu, Fe, Zn, and Cd in a reference material (Seronorm™ L-3, lot no. 1509408), trace metal standards, and their mixtures with two mixing ratios
| Seronorm to standard mixing ratios | [Cu] ± 2σ (ppm) | δ65Cu ± 2σ (na) | [Fe] ± 2σ (ppm) | δ56Fe ± 2σ (n) | [Zn] ± 2σ (ppm) | δ66Zn ± 2σ | [Cd] ± 2σ (ppb) | δ114Cd ± 2σ |
|---|---|---|---|---|---|---|---|---|
| 100% standard (unprocessed)b | −0.12 ± 0.01‰ (34) | −0.07 ± 0.02‰ (12) | −7.45 ± 0.01‰(16) | −1.46 ± 0.12‰ (2) | ||||
| 100% standard (processed)b | −0.12 ± 0.02‰ (5) | −0.07 ± 0.04‰ (1) | −7.44 ± 0.03‰ (1) | −1.37 ± 0.18‰ (1) | ||||
| 33% Seronorm-67% standard | 6.41 ± 0.03 | −0.08 ± 0.0‰ (3) | 905 ± 6 | −0.79 ± 0.0‰ (1) | 23.5 ± 1.8 | −5.02 ± 0.03‰ (1) | 28.7 ± 5.5 | −1.02 ± 0.32‰ (1) |
| 67% Seronorm-33% standard | 3.19 ± 0.02 | −0.04 ± 0.02‰ (3) | 439 ± 3 | −1.51 ± 0.04‰ (1) | 12.3 ± 1.0 | −2.61 ± 0.03‰ (1) | 17.2 ± 3.3 | −0.62 ± 0.21‰ (1) |
| 100% Seronorm | 2.10 ± 0.01 | 0.00 ± 0.03‰ (4) | 288 ± 2 | −2.21 ± 0.05‰ (1) | 8.32 ± 0.65 | −0.18 ± 0.03‰ (1) | 11.0 ± 2.1 | − 0.54 ± 0.18‰ (1) |
| Certified values for lot no. 1509408 | 2.08 ± 0.42 | - | 301 | - | 9.42 ± 1.90 | - | 9.9 ± 2.0 | - |
| Reported Seronorm™ L-3 with different lot no. | 0.703 ± 0.030c | + 0.37 ± 0.07‰d, + 0.36 ± 0.08‰e | 435 ± 32c | −2.45 ± 0.07‰d | 4.77 ± 0.28c | + 0.02 ± 0.04‰d | 11.3 ± 0.6c | - |