Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
Ca |
% |
0.157 |
0.006 |
3 |
1 |
S |
% |
0.002 |
< 0.001 |
3 |
2 |
Cr |
% |
0.004 |
0.001 |
3 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
2: Combustion with IR-detection |
3: Hot extraction with HC and IR detection |
  |