Method and procedure: Into a 5 ml conical vial. 1.0ml of mixed 1.1 sulfuric acid and nitric acid was added. 0509 of finely divided naphthalene was added in small portions to the solution while stirring after each addition, and cooling to keep the temperature around 45-50"C The reaction mixture was then stirred in a 60 C 20minutes after the addition naphthalene.