Hard Coal Suppliers – Reference Material For Coal Testing – Shandong Institute of Metallurgical Science
Hard Coal Suppliers – Reference Material For Coal Testing – Shandong Institute of Metallurgical Science Detail:
Table 1. Certified Values for YSBC 28752-95 (Mass Fraction %)
|
Number |
Elements |
TFe |
SiO2 |
Al2O3 |
CaO |
MgO |
K2O |
|
YSBC 28752-95
|
Certified Values |
64.66 |
4.34 |
1.80 |
0.011 |
0.027 |
0.082 |
|
Uncertainty |
0.15 |
0.05 |
0.03 |
0.003 |
0.002 |
0.003 |
|
|
Number |
Elements |
Na2O |
TiO2 |
Mn |
S |
P |
|
|
YSBC 28752-95 |
Certified Values |
0.01 |
0.23 |
0.007 |
0.0091 |
0.020 |
|
|
Uncertainty |
0.01 |
0.02 |
0.001 |
0.0003 |
0.002 |
Table 2. Analysis Methods
|
Composition |
Method |
|
TFe |
Titanium(III) chloride reduction potassium dichromate titration method |
|
SiO2 |
Perchloric acid dehydration gravimetric methodThe silicomolybdic blue spectrophotometric methodICP-AES |
|
Al2O3 |
The chrome azurol S photometric method ICP-AES |
|
CaO |
ICP-AESAAS |
|
MgO |
ICP-AES AAS |
|
K2O |
ICP-AES AAS |
|
Na2O |
ICP-AES AAS |
|
TiO2 |
Diantipyrylmethane spectrophotometric method ICP-AES |
|
Mn |
Potassium periodate spectrophotometric method ICP-AESAAS |
|
S |
High frequency combustion infrared absorption methodBarium sulfate gravimetric methodCombustion iodometric method |
|
P |
Bismuth phosphomolybdenum blue photometryICP-AES |
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 |
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