Wholesale Anthracite Coal Delivery Manufacturers – Certified Reference Material – Shandong Institute of Metallurgical Science
Wholesale Anthracite Coal Delivery Manufacturers – Certified Reference Material – Shandong Institute of Metallurgical Science Detail:
Table 1. Certified Values for ZBK 306 (Mass Fraction %)
|
Number |
Elements |
TFe |
FeO |
SiO2 |
Al2O3 |
CaO |
MgO |
|
ZBK 306 |
Certified Values |
65.66 |
0.54 |
1.92 |
1.64 |
0.056 |
0.102 |
|
Uncertainty |
0.17 |
0.06 |
0.04 |
0.04 |
0.006 |
0.008 |
|
|
Number |
Elements |
S |
P |
Mn |
Ti |
K2O |
Na2O |
|
ZBK 306 |
Certified Values |
0.022 |
0.060 |
0.135 |
0.048 |
0.018 |
0.007 |
|
Uncertainty |
0.001 |
0.002 |
0.003 |
0.002 |
0.002 |
0.002 |
Table 2. Analysis methods
|
Composition |
Method |
|
TFe |
Titanium(III) chloride reduction potassium dichromate titration method |
|
FeO |
Potassium dichromate titration methodThe potentiometric titrimetric method |
|
SiO2 |
Perchloric acid dehydration gravimetric methodThe silicomolybdic blue spectrophotometric methodICP-AES |
|
Al2O3 |
Complexometric titration methodThe chrome azurol S photometric methodICP-AES |
|
CaO |
ICP-AESAAS |
|
MgO |
ICP-AESAAS |
|
S |
Barium sulfate gravimetric methodThe eombustion iodometric method for the determination of sulfur content |
|
P |
Bismuth phosphomolybdate blue spectrophotometric methodICP-AES |
|
Mn |
Potassium periodate spectrophotometric methodICP-AESAAS |
|
Ti |
Diantipyryl methane photometric methodICP-AES |
|
K2O |
ICP-AES AAS |
|
Na2O |
ICP-AES AAS |
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 |
The certified reference material is packed in glass bottles with plastic covers. The net weight is 70 g each. It is suggested to keep dryness when stored. The certified reference material should be dried at 105℃ for 1 hour before use, then it should be taken out and cooled to room temperature.
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