measuring alcohol content of fuels - esp jet fuels, by colour reaction with 8-hydroxyquinoline ester of vanadic acid

摘要

An acidified soln. of 8-hydroxy quinoline in an OH-free organic solvent is added to a test tube contg. a carrier impregnated with Na vanadate. A measured amt. of the fuel under test is then passed through, and the length of zone showing a colour change is measured. This can be calibrated to give the alcohol content of the fuel. The 8-hydroxy quinoline is pref. dissolved in benzene, toluene, xylene or chlorinated hydrocarbons and acidified with glacial acetic acid.