China Crm Companies Manufacturer – Certified Reference Material of Benzoic Acid – Shandong Institute of Metallurgical Science

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China Crm Companies Manufacturer – Certified Reference Material of Benzoic Acid – Shandong Institute of Metallurgical Science Detail:

The CRM is used for the quality control and calibration of analytical instruments in analysis of Iron Concentrate. 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 Benzoic Acid

Number	Name	Certified Value* (J/g)	Uncertainty (J/g) (k=2)
GBW（E）136695	Benzoic Acid	26456	25

Note: The certified value of benzoic acid reference material is corrected by acid, it is the gross calorific values at constant volume.

The bomb calorimeter is used to make these measurements.

Twenty bottles are randomly selected to determine the measurement order. An analysis specimen is selected from each bottle, and the method is the bomb calorimeter. Variance (F) test is used to evaluate the uniformity of the CRM, when the F<F_α, sample are homogeneous.

Expiration of certification: The certification of this CRM is valid until February 1, 2031.

The certified reference material is packed in plastic bottles with plastic covers. The net weight is about 35g each bottle. It is suggested to keep dryness when stored.

National Steel Materials Testing Centre

Technology Center of Benxi Iron & Steel Group Co., Ltd

Yantai Branch,52 Institure of China Industries Group

Wuhan Iron and Steel Group Technology Center Inspection

Baoshan Iron & Steel Co., Ltd. Special Steel Branch

School of Chemistry and Chemical Engineering, Shandong University

Shandong Metallurgical Research Institute Test Center

Shandong Metallurgical Product Quality Supervision and Inspection Station

Jinan Iron and Steel Group Corporation

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309 Stainless Steel