Cr6 is tricky for you. You must get it into solution without changing it's
oxidation state to Cr3. Then you must separate it from any Cr3 if you are
using a total chrome method. I do not know if Cr3 and Cr6 can be
differentiated by ICPMS. It cannot by ICPAES.
There are reliable titration methods for analyzing Cr3 and Cr6, together in
the same solution, but your samples are solids and getting them into
solution without changing oxidation states will be your challenge. If you
want total chrome just digest in acid and analyze the resulting solution
using AA, ICP, ICPMS....
S&C Electric Company
Chicago, Illinois, 60626-3997
From: Gaeho Lee [mailto:[log in to unmask]]
Sent: Thursday, April 03, 2003 6:20 PM
To: [log in to unmask]
Subject: Cr+6 Analysis
We want to analyze Cr+6 in polymer and metal. I understand that IC, UV-Vis,
or ICP could be used. I am looking for the sample preparation and
analytical method. Thank you.
Dae M. Lee
[log in to unmask]
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