China 4150 Steel Manufacturer –  National Certified Reference Material (NCRM)  – Shandong Institute of Metallurgical Science

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China 4150 Steel Manufacturer – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science

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China 4150 Steel Manufacturer – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science Detail:

The CRM is used for the verification/calibration of oxygen bomb calorimeter. It is also used for the evaluation and verification of accuracy of the analytical methods. The CRM can be used for calorific value measurement in electric power, coal, military industry, scientific research and other fields.

Benzoic acid is purified by distillation and the purity is 99.96%. It is made into about 0.5g tablets and packed in clean plastic bottles.

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

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<Fα, 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.


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China 4150 Steel Manufacturer –  National Certified Reference Material (NCRM)  – Shandong Institute of Metallurgical Science detail pictures

China 4150 Steel Manufacturer –  National Certified Reference Material (NCRM)  – Shandong Institute of Metallurgical Science detail pictures


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Our growth depends to the superior products ,great talents and repeatedly strengthened technology forces for China 4150 Steel Manufacturer – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: Sheffield, Mongolia, Malaysia, Our company's main products are widely used all over the world; 80% of our products exported to the United States, Japan, Europe and other markets. All stuff sincerely welcome guests come to visit our factory.
  • Product variety is complete, good quality and inexpensive, the delivery is fast and transport is security, very good, we are happy to cooperate with a reputable company!
    5 Stars By Jamie from Bulgaria - 2018.09.29 13:24
    A nice supplier in this industry, after a detail and careful discussion, we reached a consensus agreement. Hope that we cooperate smoothly.
    5 Stars By Flora from Poland - 2018.09.08 17:09
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