. . . . . "Examples of fugitive ion compounds include oxalic acid, acetic acid, citric acid, formic acid, propanoic acid, malic acid, butyric acid, propenoic acid, ammonium oxalate, ammonium acetate, ammonium formate, ammonium propanoate, ammonium malate, ammonium butyrate, ammonium propenoate, aqueous ammonia and mixtures thereof and other compounds having the required volatility or decomposition properties" . .