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|Title:||Measurement Standards in Chemistry|
|Citation:||GIT Laboratory Journal no. 3-4 p. 42-44|
|Publisher:||GIT VERLAG GmbH|
|Type:||Articles in periodicals and books|
|Abstract:||Thousands of chemical measurements are performed everywhere and every day. Their results provide the basis for decisions on industrial products and processes, trade, health care, food safety or compliance with other legislative thresholds. Therefore, these data have to be reliable and comparable between laboratories and over time. For achieving comparability of measurement results between ('measurand') is always appropriately related to the same measurement scale, measurement standards are needed. The English word "standard" is used with two different meanings: for documents which are describing how the measurement procedure has to be performed to achieve comparable data (German "Norm") and for materials that realize a given quantity (French "étalon"), such as lead concentration in water. Only the latter meaning is considered in the following. Measurement standards for modern chemical analysis are far more complex than classical physical standards such as the kilogram. They had been and are developed, produced and disseminated by and increasing number of commercial and public entities.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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