China Super Duplex Suppliers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science
China Super Duplex 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.
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With our excellent management, strong technical capability and strict quality control system, we continue to provide our clients with reliable quality, reasonable prices and excellent services. We aim at becoming one of your most reliable partners and earning your satisfaction for China Super Duplex Suppliers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: Venezuela, Uzbekistan, Montpellier, Our factory covers an area of 12,000 square meters, and has a staff of 200 people, among which there are 5 technical executives. We are specialized in producing.We have rich experience in export. Welcome to contact us and your enquiry will be replied as soon as possible.
By Nora from Japan - 2018.11.28 16:25
This is a honest and trustworthy company, technology and equipment are very advanced and the prodduct is very adequate, there is no worry in the suppliment.
By Monica from Jordan - 2018.10.01 14:14
