Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
CaO |
% |
18.34 |
0.08 |
6 |
1 |
Al2O3 |
% |
64.30 |
0.21 |
4 |
1 |
Cr2O3 |
% |
0.054 |
0.004 |
5 |
1 |
* Measuring method | |
1: X-ray fluorescence spectrometry |
2: Combustion with IR-detection |
Comment |
Thermal treatment of material before weighing: 900°C, 1 h |