炭素, 水素, 硫黄及びハロゲンの同時微量分析法

抄録

Examinations were made on the concurrent determination of sulfur and halogen, and the use of manganese dioxide as an agent in removing nitrogen oxides outside the combustion tube. With further improvement, these results were applied to the analyses of carbon and hydrogen, and it became possible to determine carbon, hydrogen, sulfur, and halogen at the same time. In this method, the sample is burned in oxygen atmosphere with platinum catalyst, the sulfur oxide and halogen formed are absorbed in absorption funnel, filled with somewhat coarse hairy silver formed during electrolysis of silver. The increase in its weight is weighed, silver sulfate absorbed in the funnel is washed off with water, and analytical value of sulfur is calculated from the decrease in weight. The analytical value of halogen is calculated from the amount of insoluble silver halide remaining in the funnel. Nitrogen oxide is removed by manganese dioxide provided between carbon dioxide-absorption tube and water absorption tube. The air supplied through the branch of combustion tube is preliminarily passed through a layer of sodium asbestos-anhydron and this removes the error in carbon and hydrogen determination. By using two sets of absorption tubes and absorption funnels alternately, the total analysis time can be limited to around 60 minutes, and good analytical values can be obtained for carbon, hydrogen, sulfur, and halogen.