China Semi Anthracite Suppliers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science
China Semi Anthracite Suppliers – 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.
Product detail pictures:
Related Product Guide:
With a complete scientific quality management system, good quality and good faith, we win good reputation and occupied this field for China Semi Anthracite Suppliers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: Rwanda, Mexico, Kuwait, Our company has always insisted on the business principle of "Quality, Honest, and Customer First" by which we have won the trust of clients both from at home and abroad. If you are interested in our products, please do not hesitate to contact us for further information.
By Lesley from Qatar - 2018.09.16 11:31
We always believe that the details decides the company's product quality, in this respect, the company conform our requirements and the goods are meet our expectations.
By Roland Jacka from European - 2018.09.16 11:31