Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
Ca |
% |
25.15 |
0.05 |
6 |
1 |
S |
% |
0.132 |
0.011 |
6 |
1 |
K2O |
% |
0.830 |
0.006 |
5 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
2: Atomic absorption spectrometry |
3: Specific ion electrode end point |
  |
Comment |
Thermal treatment of material before weighing: 800°C, 1 h |