China 431 Stainless Steel Factory – Converter Slag Certified Reference Material for Chemical Analysis – Shandong Institute of Metallurgical Science

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China 431 Stainless Steel Factory – Converter Slag Certified Reference Material for Chemical Analysis – Shandong Institute of Metallurgical Science Detail:

The CRM is used for the quality control and calibration of analytical instruments in analysis of converter slag. It is also used for the evaluation and verification of accuracy of the analytical methods. The CRM can be used for the transfer of measured value.

Table 1. Certified Values for YSBC 28863-2017 (Mass Fraction %)

Number	Elements	TFe	SiO2	CaO	MgO	Al2O3	FeO*	MnO	TiO2	S	P2O5
YSBC 28863-2017	Certified Values	15.33	14.17	44.45	7.01	2.76	11.43	2.40	0.65	0.17	2.21
YSBC 28863-2017	Uncertainty	0.09	0.09	0.11	0.08	0.04	0.07	0.04	0.02	0.01	0.04
Number	Elements	K2O	Na2O	Cr₂O₃*	V₂O₅*	As*	Pb*	Zn*	F*	Cd*
YSBC 28863-2017	Certified Values	0.10	0.13	0.12	0.186	0.0003	0.0074	0.010	0.39	(0.0001)
YSBC 28863-2017	Uncertainty	0.01	0.01	0.01	0.004	0.0001	0.0004	0.001	0.01	—

Note 1: ( ) Indicates information value

Note 2: * Indicates that it is not within the recommended scope for production proficiency of RMP

Table 2. Analysis methods

Composition	Method
TFe	Titanium(Ⅲ) chloride reduce potassium dichromate titration method
SiO₂	Perchloric acid dehydration gravimetric method ICP-AES
CaO	EDTA titrimetric method Potassium permanganate titration method

MgO

EDTA titrimetric method

EyDTA titrimetric method ICP-AES

Al₂O₃

EDTA titrimetric method

The chrome azurol S photometric method ICP-AES

FeO

Potassium dichromate titration

MnO

ICP-AES AAS

Potassium periodate spectrophotometric method

TiO₂

ICP-AES

Diantipyrylmethane spectrophotometric method

High frequency combustion infrared absorption method Barium sulfate gravimetric method

Combustion iodometric method

ICP-AES

P₂O₅

Bismuth phosphomolybdenum blue photometry

ICP-AES

K₂O

ICP-AES AAS

Na₂O

ICP-AES

AAS

Cr₂O₃

ICP-AES AAS

Diphenyl carbazide spectrophotometric method

V₂O₅

ICP-AES

The N-benzoyl’-N-phenylhydroxylamine extraction spectrophotometric method AAS

ICP-AES

Hydride generation ICP-AES AFS

ICP-MS

Hydride generation AAS

ICP-MS ICP-AES

Carrier precipitation- ICP-AES

AAS

ICP-AES

AAS

Ion-selective electrode method Ion chromatography

ICP-MS

GAAS

Expiration of certification: The certification of this CRM is valid until February 1, 2022.

Table 3. Methods for homogeneity testing

Composition	Analysis methods	Minimum sample (g)
TFe	Titanium(Ⅲ) chloride reduce potassium dichromate titration	0.2
FeO	Potassium dichromate titration	0.2
SiO₂	Perchloric acid dehydration gravimetric method	0.2
CaO, MgO	EDTA titrimetric method	0.2
Al₂O₃, MnO, TiO₂, P ₂O₅, K₂O, Na₂O, Cr₂O₃, V₂O₅, Pb, Zn	ICP-AES	0.1
S	High frequency combustion infrared absorption method	0.1
F	Ion-selective electrode method	0.2
As, Cd	ICP-MS	0.2

The certified reference material is packed in glass bottles with plastic covers. The net weight is 50g 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.

Shanghai Baosteel Technology Center

Angang Technology Centre

WISCO Technology Centre

52 Institure of China Industries Group

ChongQing Iron Steel Research Institure Co.Ltd

Standard Sample Institute, Wuhan University of Science and Technology

Shandong Metallurgical Research Institute Test Center

Shandong Metallurgical Product Quality Supervision and Inspection Station

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