Is there any way to troubleshoot flow through Lachat Cadmium Column for Nitrate determination?

Document ID

Document ID TE6376

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
Is there any way to troubleshoot flow through Lachat Cadmium Column for Nitrate determination?
Summary
Cadmium column flow concern
Answer
To check the flow efficiency of the Lachat Cadmium Column for Nitrate determination (Catalog Number/Order Code 50237A) :
 
1. Disconnect the cadmium column from the manifold and reconnect to a green-green
pump tube.
2. Pump buffer through the packed column and collect it in a graduated cylinder.
The flow rate should be greater than 4.0 mL per minute. A low flow rate indicates that the
column is partially clogged.  The direction of the column can be changed to see if flow improves in the other direction.