How can turbidity in the cuvette be prevented during a nickel test?

Document ID

Document ID TE9178

Published Date

Published Date 24/09/2019
Question
How can turbidity in the cuvette be prevented during a nickel test?
Summary
When using the nickel cuvette tests LCK337/LCK537, turbidity (after the addition of A) can prevent correct evaluation.
Answer
When heavy metal detoxification processes are carried out in the electroplating industry, milk of lime is frequently used to raise the pH value. This means that the runoff contains significant Ca2+ concentrations. When used in the nickel tests LCK337 and LCK537, Reagent A greatly raises the pH value, meaning that calcium compounds can occur as turbidity. This turbidity can be prevented by adding sodium citrate.

Heavy metals analysis in practice