China Invar Metal – Reference Material For Instrument Calibration – Shandong Institute of Metallurgical Science
China Invar Metal – Reference Material For Instrument Calibration – Shandong Institute of Metallurgical Science Detail:
Table 1. Certified Values for YSBC 28604a-2013 (Mass Fraction %)
|
Number |
Elements |
C |
S |
Si |
Mn |
P |
Fe |
Al |
|
YSBC 28604a-2013 |
Certified Values |
0.050 |
0.002 |
69.96 |
0.256 |
0.023 |
26.57 |
1.26 |
|
Uncertainty |
0.003 |
0.001 |
0.10 |
0.004 |
0.001 |
0.06 |
0.02 |
|
|
Number |
Elements |
Ca |
Cu |
Ni |
Cr |
Ti |
Mg | |
|
YSBC 28604a-2013 |
Certified Values |
0.649 |
0.013 |
0.010 |
0.049 |
0.107 |
0.019 |
|
|
Uncertainty |
0.005 |
0.001 |
0.001 |
0.002 |
0.004 |
0.001 |
Table 2. Analysis Methods
|
Composition |
Method |
|
C |
The Infrared absorption method
Gas-volumetric method |
|
S |
The Infrared absorption method
Combustion iodometric method |
|
Si |
Perchloric acid dehydration gravimetric method
Silicon potassium fluoride titrimetric method |
|
Mn |
Periodate photometric method
ICP-AES |
|
P |
Bismuth phosphomolybdate blue spectrophotometric method
Antimony phosphomolybdate blue spectrophotometric method ICP-AES |
|
Fe |
Potassium dichromate titration method |
|
Al |
EDTA titrimetric method
The chrome azurol S photometric method ICP-AES |
|
Ca |
ICP-AES
AAS |
|
Cu |
BCO spectrophotometric method
ICP-AES AAS |
|
Ni |
Dimetylglyoxime spectrophotometric method
ICP-AES |
|
Cr |
Diphenyl carbon acyl dihydrazide photometry
ICP-AES |
|
Ti |
Diantipyryl methane photometric method
ICP-AES |
|
Mg |
ICP-AES
AAS |
Expiration of certification: The certification of this CRM is valid until November 1, 2023.
Table 3. Methods for homogeneity testing
|
Composition |
Analysis methods |
Minimum sample (g) |
|
Si |
Silicon potassium fluoride titrimetric method |
0.1 |
|
C、S |
The Infrared absorption method |
0.2 |
|
Mn、P、Al、Ca、Cu、Ni、Cr、Ti、Mg |
ICP-AES |
0.2 |
|
Fe |
Potassium dichromate titration method |
0.2 |
The certified reference material is packed in glass bottles with plastic covers. The net weight is 50 g each. It is suggested to keep dryness when stored.
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