Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
CaO |
% |
1.35 |
0.01 |
5 |
1 |
S |
% |
0.019 |
0.003 |
5 |
1,2 |
K2O |
% |
0.072 |
0.002 |
5 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
2: Combustion with IR-detection |
3: Atomic absorption spectrometry |
  |
Comment |
Thermal treatment of material before weighing: 105°C, 1 h |