Why does the certificate of analysis (COA) for a standard not list a standard deviation?

Document ID

Document ID TE1272

Version

Version 1.0

Status

Status Published

Published Date

Published Date 12/03/2017
Question
Why does the certificate of analysis (COA) for a standard not list a standard deviation?
Summary
Standard deviation is not on a certificate of analysis
Answer
Hach does not make multiple determinations of test results when creating a COA and thus a standard deviation is not generated.