Uns S31254 Factory – Coke Series National And Industrial Reference Materials – Shandong Institute of Metallurgical Science

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Certified Reference Material of Benzoic Acid (Calorimetric Standard) The CRM can be used for calorific value measurement in electric power, coal, military industry, scientific research and other fields.

Code: GBW（E）136695

Batch Number: 2021-01

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Uns S31254 Factory – Coke Series National And Industrial Reference Materials – Shandong Institute of Metallurgical Science Detail:

Table 1. Certified Values for GSB 03-2022-2006 (Mass Fraction %)

Number	Elements	TFe	FeO	SiO₂	Al₂O₃	CaO	MgO	S
GSB 03-2022-2006	Certified Values	61.53	0.24	3.43	2.12	0.118	0.109	0.038
GSB 03-2022-2006	Uncertainty	0.10	0.01	0.04	0.05	0.007	0.005	0.002
Number	Elements	P	Mn	Ti	K₂O	Na₂O	Cu	Ni
GSB 03-2022-2006	Certified Values	0.068	0.276	0.052	0.026	0.034	0.0014	0.0027
GSB 03-2022-2006	Uncertainty	0.002	0.005	0.002	0.003	0.003	0.0002	0.0003.
Number	Elements	Co	As	Pb	Zn	Cr
GSB 03-2022-2006	Certified Values	0.0009	0.0011	0.0008	0.0020	0.0054
GSB 03-2022-2006	Uncertainty	0.0001	0.0002	0.0001	0.0003	0.0004

Table 2. Analysis Methods

Composition	Method
TFe	Titrimetric method after tin (Ⅱ) chloride reduction Titanium (Ⅲ) chloride reduce potassium dichromate titration method
FeO	Potassium dichromate titration method Sulfosalicylic acid spectrophotometric method Potentiometric titration method
SiO₂	Perchloric acid dehydration gravimetric method The silicomolybdic blue spectrophotometric method ICP-AES
CaO	AAS ICP-AES
MgO	AAS ICP-AES
Al₂O₃	EDTA titrimetric method ICP-AES
Ti	ICP-AES Diantipyrylmethane spectrophotometric method
Mn	ICP-AES AAS Potassium periodate spectrophotometric method
P	N-butyl alcohol-chloroform extraction molybdenum blue spectrophotome-tric method The butyl acetate extraction photometric method Phosphovanoclonoiybeate molecular absorption spectromrtric method Bismuth phosphomolybdenum blue photometry ICP-AES
S	High frequency combustion infrared absorption method Barium sulfate gravimetric method Combustion iodometric method
K₂O	ICP-AES AAS
Na₂O	ICP-AES AAS
Cu	ICP-AES AAS GFAAS
Ni	AAS GFAAS ICP-AES
Co	AAS GFAAS ICP-AES
As	Silver diethyldithiocarbamate spectrophotometry Arseno molybdenum blue spectrophotometric method after the extraction separation GFAAS HGAAS ICP-AES
Pb	GFAAS AAS ICP-AES ICP-MS
Zn	ICP-AES AAS
Cr	AAS GFAAS ICP-AES

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.

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