Hypochlorite, in solutions with a wide range of pH, can be determined as bromide by flow injection voltammetry at a glassy carbon electrode by injection into a dilute sulphuric acid eluent containing 1%m/V of potassium bromide. With 2.5 M sulphuric acid eluent the rectilinear range is from 0.08 to 2 × 10^–3M. Hypobromite solutions containing an excess of bromide can be analysed similarly, omitting potassium bromide from the eluent.

Ammonia and hydrazine in the range 0.05–0.7 × 10^–3M were determined with a relative error of <5% by reaction with 1 × 10^–3M hypobromite in phosphate buffer solution (pH 9.8) and determining the excess of hypobromite by flow injection voltammetry.