Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
Si |
% |
0.226 |
0.023 |
3 |
1 |
Zn |
% |
1.36 |
< 0.01 |
3 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
  |