Дата публикации: 20.02.2024
CERTIFIED REFERENCE MATERIAL FOR THE MASS FRACTION OF SODIUM CARBONATE IN HIGH PURITY SODIUM CARBONATE (Na2CO3 crm uniim)
GSO 10450-2014
Description: the certified reference material (CRM) for the mass fraction of sodium carbonate in high purity sodium carbonate is a white powder supplied in labeled plastic bottles with a capacity of 30 cm3 containing 10 g of material.
Intended use:
— for transfer of a unit of mass fraction of the main component to certified reference materials for the composition of chemical substances and chemical reagents by acid-base reaction;
— for calibration measurement instruments, control of metrological characteristics during testing of measuring instruments, including for the purpose of type approval;
— for metrological certification of measurement procedures and accuracy control of measurement results during the application of measurement techniques.
Metrological characteristics:
|
Certified characteristic |
Certified value range |
Absolute expanded uncertainty at k=2, Р=95% |
|
Mass fraction of sodium carbonate, % |
99.95 – 100.00 |
0.025 -0.030 |
The certified value and expanded uncertainty of the certified value are to be established in accordance with the provisions of ISO Guide 35 for the definite batch of CRM.
Storage and transportation conditions: the certified reference material should be stored in its original container at a temperature of (20±10)°С and a relative air humidity no more than 80 % in the absence of contacts with aggressive media.
Transportation of the certified reference material is allowed only in a container by any means of transport.
Measurement method: metrological characteristics of the certified reference material are determined by the coulometric titration method in accordance with МА 20-223-2014 “CRM for mass fraction of sodium carbonate in high purity sodium carbonate GSO 10450-2014.