Does sulfate interfere with the Xenosep® test?

Document ID

Document ID TE879

Version

Version 3.0

Status

Status Published

Published Date

Published Date 25/01/2018
Question
Does sulfate interfere with the Xenosep® test?
Summary
Xenosep® sulfate interference
Answer
The interference of thiosulfate has been identified by the EPA and provisions made for it in EPA method 1664B Section 1.8. The hexane extract can be treated with activated copper per the 1664 “Cu” method which will remove the interference.

Visit the EPA website to download the most current versions of EPA method 1664B.  The Xenosep Method 10300 can be downloaded from the Hach website.