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硫酰氟是一种新型的粮食熏蒸剂。关于硫酰氟的分析方法,国外已有了一些报导。我们在S.G.Heuser容量法的基础上加以改进,用于硫酰氟样品的纯度测定,又将的比色法加以修改,用于施放硫酰氟时测定空气中硫酰氟的浓度。容量法测定1.原理S.G.Heuser报导了如下反应: SO_2F_2+2NaOH→NaSO_3F+NaF+H_2O本反应缓慢,要48小时才能反应完全。在氢氧化钾-乙醇溶液中有着类似的反应:
Sulfuryl fluoride is a new type of food fumigant. Sulfuryl fluoride on the analysis methods, some reports have been abroad. We improved on the basis of the S.G. Heuser volumetric method for the determination of the purity of sulfuryl fluoride samples and modified the colorimetric method for the determination of the concentration of sulfuryl fluoride in air when applying sulfuryl fluoride. Volumetric Determination 1. Principle S.G. Heuser reported the following reaction: SO 2 F 2 + 2NaOH → NaSO 3 F + NaF + H 2 O The reaction was slow and required 48 hours to complete the reaction. A similar reaction occurs in potassium hydroxide-ethanol solution: