China Alloy Metal – Reference Material For Ore Detection – Shandong Institute of Metallurgical Science

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China Alloy Metal – Reference Material For Ore Detection – Shandong Institute of Metallurgical Science Detail:

The CRM is used for the quality control and calibration of analytical instruments in analysis of Coal. 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.

New standard coal

Table 1. Certified Values for GBW (E) 110109 (k=2)

Number	Elements	P/%	As*/μg/g	F/μg/g	Cl*/%	Hg*/μg/g
GBW(E)110109	Certified Values	0.0080	22	158	0.051	0.03
GBW(E)110109	Uncertainty	0.0008	3	11	0.005	0.01

Note 1: * Indicates that it is not within the recommended scope for production proficiency of CNAS

Table 2. Analysis methods

Composition	Method
P	Reduced molybdophosphate photometric method ICP-AES
As	HG-ICP-AES HG-AFS
F	Fluorine ion-selective electrode analysis Ion chromatography
Cl	The potentiometric titrimetric method Ion chromatography
Hg	Cold atomic absorption spectrometric method AFS Solid sampling and direct mercury analysis method

Expiration of certification: The certification of this CRM is valid until June 1, 2024.

Table 3. Methods for homogeneity testing

Composition	Analysis methods	Minimum sample (g)
P	ICP-AES	1
As	HG-ICP-AES	1
F	Fluorine ion-selective electrode analysis	0.5
Cl	The potentiometric titrimetric method	0.5
Hg	AFS	0.5

The certified reference material is packed in brown glass bottles with plastic covers. The net weight is 50 g each. It is suggested to keep dryness when stored.

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431 Stainless Steel