According to the principle of chemical reaction

the effects of different acids on each other were investigated.A continuous process and formulas of chemical titration for mixed acids determination were developed

which achieved simple

fast

accurate determination purposes of the concentration of each component in mixed acid.With this method

a kind of unknown polycomponent mixed acid offered by electroplating enterprise was titrated.The results show that it contains nitric acid

sulfuric acid and hydrofluoric acid

and the percentage compositions of them are 1.52%

89.46%

0.193 5%

respectively.The acids’ content verified by chemical precipitation method and ion chromatography proved that the titration method is enough to meet the physical determination demands.