Expiration of certification: The certification of this CRM is valid until December 1, 2028.
Table 3. Methods for homogeneity testing
Composition
|
Analysis methods
|
Minimum sample (g)
|
TFe
|
Titanium(III) chloride reduction potassium dichromate titration method
|
0.2
|
FeO
|
Potassium dichromate titration method |
0.2
|
SiO2, Al2O3, CaO, MgO
|
ICP-AES
|
0.1
|
Mn, Ti
|
ICP-AES
|
0.2
|
P, K2O, Na2O
|
ICP-AES
|
0.5
|
S
|
The eombustion iodometric method for the determination of sulfur content
|
0.5
|