Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
Fe |
% |
0.677 |
0.004 |
3 |
1 |
Cu |
% |
81.84 |
0.08 |
3 |
1 |
Sb |
% |
0.104 |
0.005 |
3 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
  |