User:Enix150/ReagentTables/Mandelin

When interpreting the result of the Mandelin test, account should be taken of the colour given by sulfuric acid and by Liebermann’s test. Hydrochlorides give a red colour with this reagent. When the colours differ from those given with sulfuric acid or Liebermann’s test, this indicates an aromatic ring together with a saturated 5-, 6- or 7-membered ring that contains only one nitrogen atom. The heterocyclic ring must not contain a second nitrogen atom or an oxygen atom. It must not be substituted or bound by –CONH– to the aromatic ring. The aromatic ring must not have –CF3 as a substituent. Colours are also produced if sulfur is in a ring, provided that the ring does not contain more than one nitrogen atom.

Recipes:
 * 1 g of ammonium vanadate to 1.5 mL water and dilute to 100 mL with concentrated sulfuric acid
 * 1.2 g of ammonium metavanadate to 95 m L water and 5 mL concentrated sulfuric acid