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基于稀硫酸介质中溴离子催化过氧化氢氧化甲基橙，建立了测定痕量溴离子的新催化光度法．方法灵敏度为2×10－3 mg／L（△A=0．001，b=1cm）．检出限为3×10mg／L．测定溴离子的线性范围为 0．10 ～1．30mg／L.用于测定金属镁与硫酸铵中的溴．
A new catalytic spectrophotometric method for the determination of trace bromine ion was established based on the oxidation of methyl orange by hydrogen peroxide in dilute sulfuric acid medium. The sensitivity of the method was 2 × 10-3 mg / L (△ A = 0.001, b = 1cm). The detection limit was 3 × 10mg / L. Determination of bromide linear range of 0.10 ~ 1.30mg / L. For the determination of magnesium metal and ammonium bromide.