China Bituminous Coal Smithing Coal Factory – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science
China Bituminous Coal Smithing Coal Factory – 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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We rely upon strategic thinking, constant modernisation in all segments, technological advances and of course upon our employees that directly participate inside our success for China Bituminous Coal Smithing Coal Factory – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: French, Bolivia, Cambodia, We always stick to the tenet of "sincerity, high quality, high efficiency, innovation". With years of efforts, we have established friendly and stable business relationships with worldwide customers. We welcome any of your inquiries and concerns for our products, and we are sure that we will offer just what you want, as we always believe that your satisfaction is our success.
By Rosalind from Hungary - 2017.10.23 10:29
Factory equipment is advanced in the industry and the product is fine workmanship, moreover the price is very cheap, value for money!
By Rosalind from Barbados - 2017.08.18 11:04
