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在室温及酸性条件下，甲醛对溴酸钾氧化乙基橙的反应具有显著的促进作用，且反应具有一定的诱导期。通过测量诱导期建立了测定甲醛的动力学分析新方法，测定甲醛的线性范围为0．10－1．5mg/L，检测限为0．05mg／L。利用此法测定了废水中的甲醛，结果满意。
At room temperature and acidic conditions, formaldehyde on the reaction of ethyl bromate potassium bromate oxidation has a significant role in promoting, and the reaction has a certain induction period. A new kinetic method for the determination of formaldehyde was established by measuring the induction period. The linear range of formaldehyde was 0.10-1.5 mg / L and the limit of detection was 0.05 mg / L. The formaldehyde in waste water was determined by this method and the result was satisfactory.