Assay of sodium carbonate

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000063" target="_blank" >RIV/00177016:_____/23:N0000063 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/0026-1394/60/1A/08004" target="_blank" >https://iopscience.iop.org/article/10.1088/0026-1394/60/1A/08004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0026-1394/60/1A/08004" target="_blank" >10.1088/0026-1394/60/1A/08004</a>

Result language

angličtina

Original language name

Assay of sodium carbonate

Original language description

The CCQM-K173 Assay of Sodium Carbonate key comparison was jointly organized by the Inorganic Analysis (IAWG) and Electrochemical Analysis and Classical Chemical Methods (EAWG) working groups of CCQM to test the abilities of the national metrology institutes (NMIs) to measure the purity or amount content of solid bases. They are important challenges for reference material producers, providers of other measurement services, such as proficiency testing schemes. Evidence of successful participation in formal, relevant international comparisons are needed to support calibration and measurement capability claims (CMCs) made by NMIs and designated institutes (DIs). Nine NMIs participated in this key comparison CCQM-K173. National Institute of Metrology P. R. China (NIM) and Ural Research Institute for Metrology - Affiliated Branch of the D.I. Mendeleyev Institute for Metrology (VNIIM-UNIIM), Russian Federation, acted as the coordinating laboratories of the comparison. The measurement methods used by the participants for measuring the amount content of bases expressed as sodium carbonate were coulometry and titrimetry. In general, good overlap of results was observed, the suitability of coulometry and titrimetry for assay of high purity materials was demonstrated. The majority of results were split in two groups differing from each. This bias was however covered by the stated uncertainty estimates. Various effects have been evaluated that may cause it. However, the reason for the bias has not been identified clearly. The final report from the comparison has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Metrologia

ISSN

1681-7575

e-ISSN

1681-7575

Volume of the periodical

60

Issue of the periodical within the volume

Number 1A

Country of publishing house

FR - FRANCE

Number of pages

37

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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