How are the Hach chlorine standards made?

Document ID

Document ID TE8977

Version

Version 4.0

Status

Status Published

Published Date

Published Date 04/16/2019
Question
How are the Hach chlorine standards made?
Summary
Hach chlorine standard preparation
Answer
The Hach Chlorine standard solutions (Product # 1426810, 2630020, and 1426820) are prepared by generating and dissolving chlorine gas in slightly alkaline, high purity water of zero chlorine demand. The standard is packaged into clean ampules and sealed under argon. After preparation, ampules are assayed and stored between 2° - 8° C prior to shipment.

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