Abstract
A method for the direct titration of cinnamic acid with bromine monochloride is proposed. Of the several amperometric methods of end-point detection studied, a bi-amperometric procedure with twin platinum electrodes was found to be most satisfactory. The limitation to the use of bromine monochloride as a titrant because of its high volatility can be overcome by coulometric generation of the reagent. Constant-current electrolysis of an acidic solution containing bromide, chloride and mercury(II) ions generates a complex anion of bromine monochloride.
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