How often is it recommend to run a primary standard for a colorimetric method?

Document ID

Document ID TE5143

Published Date

Published Date 27/05/2017
Question
How often is it recommend to run a primary standard for a colorimetric method?
Summary
Frequency of accuracy check.
Answer
It is recommended that a primary standard be ran for each lot of reagent. If for compliance, check with your regulator for recommended frequency as they may require an accuracy check more frequently.

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