Is there any way to increase the life of the Lachat Cadmium Column for Nitrate determination?

Document ID

Document ID TE3683

Published Date

Published Date 01/29/2019
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Question
Is there any way to increase the life of the Lachat Cadmium Column for Nitrate determination?
Summary
Tips for cadmium columns
Answer
There are a couple of suggestions that can be considered.
  • The Column, Cadmium, for Nitrate determination (Product # 50237A) is packed in water. Hooking them up and pumping buffer through them upon receipt may help.
  • A small amount of copper sulfate can be added to the buffer solution to help keep the cadmium copperized. The copper would be added to the buffer solution used when running the method. Two drops of a solution of 20 g/L copper sulfate can be added to each one liter of buffer. A weaker solution can be considered if buffer is prepared in smaller amounts.

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