催化动力学分光光度法测定痕量甲醛

Determination of Trace Formaldehyde by Catelytic Kinetic Spectrophotometry

在稀硫酸溶液中，甲醛对溴酸钾氧亚甲蓝褪色反应有催化作用，研究其动力学条件，建立了测定痕量甲醛的动力学光度分析方法。结果表明，该法线性范围为0.00～0．80μg·L^-，检出限3．315×10^-8g·mL^-1。该法用于食用菌、杏仁和漆料的浸泡液中痕量甲醛的测定，标准加入回收率为96．7％～104．2％

A kinetic spectrophotometric method for determination of trace formaldehyde was developed is based on the accleration effect of form adehyde on the oxidation reaction of methylone - blue by KBrO3 in sulphurie acid medium . The linear range is 0. 00 -0. 80 μg · mL^-1 with the detection limit of 3. 135 × 10^-8g · mL^-1. The procedure was used to determine the formaldehyde in soak solution samples of edible fungus, almond and vehicle. The recoveries in standard addition method were 96. 7% - 104.2%.