You know what it looks like… but what is it called?
TAKE THE QUIZ“Carius”
We have one entry that includes the term Carius.
Carius method
noun: a method for determining halogens, sulfur, and phosphorus in organic compounds by heating them in sealed glass tubes with fuming nitric acid in a special furnace, the glass tubes being enclosed in iron tubes to avoid danger from explosion
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Merriam-Webster unabridged