Expiration of certification: The certification of this CRM is valid until January 1, 2025.
Table 3. Methods for homogeneity testing
Composition
|
Analysis methods
|
Minimum sample (g)
|
TFe
|
Titanium(III) chloride reduction potassium dichromate titration method
|
0.2
|
SiO2
|
The silicomolybdic blue spectrophotometric method
|
0.2
|
Al2O3、CaO、MgO、TiO2、Mn、P
|
ICP-AES
|
0.2
|
K2O、Na2O
|
AAS
|
0.2
|
S
|
The Infrared absorption method
|
0.2
|