动力学光度法测定痕量甲醛

Study on Determination of Trace Formaldehyde by Kinetic Spectrophotometry

在稀硫酸溶液中,痕量甲醛对氯酸钾氧化玫瑰桃红R褪色反应有催化作用,研究了其动力学条件,测定了动力学反应参数,建立了测定痕量甲醛的动力学光度分析新方法,线性范围为0.02～0.5mg／L,检出限为8.0μg／L;灵敏度较高,选择性较好;该法用于新建住宅室内空气及建筑粘合剂中痕量甲醛的测定,结果满意。

A kinetic spectrophotometric method for the determination of trace formaldehyde was proposed based on the formaldehyde which can catalyze the discoloring reaction of KClO 3 and acid Bordeaux R in sulfuric acid.The linear range is0.02～0.5mg/L and the detection limit is8.0μg/L.The sensibility is high and the selectivity is good.The procedure has been used to determine the formaldehyde content in air of new buildings and adhesive with satisfactory results.