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Lamotte Potassium test kit question
Could one of you chemist types explain this notice found on my Lamotte
Potassium test kit?
"When using tetraphenylboron powder and a colorimeter to test for potassium,
carry a reagent blank through the procedure. Subtract the results of the
reagent blank from all subsequent tests."
I think this means that if I was using a colorimeter, I would run a
distilled water sample through the test to determine a baseline to subtract
from future tests. Is this correct?