【摘要】 在稀硫酸溶液中,甲醛对KClO3氧化罗丹明6G褪色反应有催化作用,研究了其动力学条件,建立了测定痕量甲醛的动力学光度分析方法,线性范围为0.02～1.8μg/mL,检出限为1.5×10-8g/mL。该法用于湖水、饮料和漆料中痕量甲醛的测定,标准加入回收率为93.8%～108.5%,RSD为2.6%～3.4%。更多还原

【Abstract】 A kinetic spectrophotometric method for determination of trace formaldehyde was proposed. Formaldehyde catalyzed the discoloring reaction of rhodamine 6G by KClO₃ in sulfuric acid. The linear range was 0.02～1.8 μg/mL with the detection limit of 1.5×10^-8 g/mL. The procedure was used to determine the formaldehyde in lake water, beverages and painting samples. The recoveries in standard addition method were 93.8%～108.5%, RSD were 2.6%～3.4%.更多还原