Wholesale Certified Reference Material Certificate Manufacturers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science
Wholesale Certified Reference Material Certificate Manufacturers – 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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Good quality comes 1st; assistance is foremost; business enterprise is cooperation" is our business enterprise philosophy which is regularly observed and pursued by our company for Wholesale Certified Reference Material Certificate Manufacturers – National Certified Reference Material (NCRM) – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: Austria, Sydney, Austria, We aim to become the modern enterprise with the commercial ideal of "Sincerity and confidence" and with the aim of "Offering customers the most sincere services and best quality products". We sincerely ask for your unchanged support and appreciate your kind advice and guidance.
By Christopher Mabey from Finland - 2018.06.26 19:27
This supplier's raw material quality is stable and reliable, has always been in accordance with the requirements of our company to provide the goods that quality meet our requirements.
By Delia Pesina from Brasilia - 2018.09.19 18:37
