What can cause the sample to turn blue after reagent addition in molybdenum method 8036?

Document ID

Document ID TE5194

Published Date

Published Date 25/01/2018
Question
What can cause the sample to turn blue after reagent addition in molybdenum method 8036?
Summary
Blue color develops during method 8036
Answer
If a blue color develops while using method 8036, it is likely due to a reaction between CDTA and a metal. The metal is probably copper. A dilution is recommended in this case.