Analyte | Unit | Certified value | Confidence interval (95%) |
No. of independent repeated series |
Measuring method* |
Ca | % | 0.357 | 0.003 | 6 | 1 |
Al | % | 1.316 | 0.010 | 6 | 1 |
Ni | % | 0.049 | 0.002 | 6 | 1,2 |
* Measuring method | |
1: X-ray fluorescence spectrometry | 2: ICP with high resolution mass spectrometry |
3: Combustion with IR-detection |