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Primary standard

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The Primary Standard

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primary and secondary standard solution

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Preparing a standard solution

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Primary and Secondary Standard B.Pharm I Sem

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Primary standard

A primary standard in metrology is a standard that is sufficiently accurate such that it is not calibrated by or subordinate to other standards. Primary standards are defined via other quantities like length, mass and time. Primary standards are used to calibrate other standards referred to as working standards. See Hierarchy of Standards.
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