酸化バメナジウム(5)融解による有機化合物中の諸元素の検出
スポンサーリンク
概要
- 論文の詳細を見る
When organic compounds are treated by sodium fusion, nitrogen, sulfur and halogens are taken up in the residue and in order to librate these elements, the residue should be dissolved in an acid solution. However, if organic compounds are fused under an acidic condition, these elements contained will be librated during the fusion and such a treatment may be quite useful for samples such as halogen compounds which should be decomposed to the elementary state for the detection. The authors have found that vanadium(V) oxide is the most suitable acidic flux for such purposes. In this study, the sample organic compounds were treated by a vanadium(V) oxide fusion and the elements were oxidized and the vapors formed were detected with several test paper. A small portion of a solid sample or the residue which was left after evaporation of one drop of a sample solution was mixed up with a 0.5 g portion of vanadium(V) oxide in a test tube. The mouth of the test tube was convered with another test tube. The sample in the tube was gradually heated until a dull red heat and the gas librated was contacted with a test paper. Carbon and hydrogen were converted to carbon dioxide and water, respectively, and these vapors were detected from the decoloration of a red sodium carbonate-phenolphtha-lein test paper. Carbon and hydrogen in levulose, etc., were detected by this way. Thus this method is useful because it enables the detection of these elements which can not be done by sodium fusion. Nitrogen which is taken up in the flux by sodium fusion can be librated as nitrous oxide and detected by coloration of a gries reagent paper; nitrogen in ο-tolidine, etc. was detected by this way. All type of sulfur can be librated as sulfur trioxide and it can be detected from decoloration of a red barium rhodizonate test paper. Sulfur in thiophene, etc. was detected by this way. This method is more favorable than the sodium fusion which convert sulfur into sulfide or sulfurous salt depending on the chemical condition in the sample and thus can not detect sulfur by such a way described above. Chlorine and bromine were librated as elementary gases which colored a potassium iodide-starch test paper and similary, iodine librated by a starch test paper. Fluorine was librated as hydrofluoric acid gas which decolored a red alizarine-zirconium test paper. Chlorine in 3, 3-dichlorobenzidine, etc., bromine in eosin, etc., iodine in tetra-<I>n</I>-propylammonium iodide, etc., and fluorine in 3-nitrobenzotrifluoride, etc. were detected by this method.
- 社団法人 日本分析化学会の論文
著者
関連論文
- オキシヒドロキノンによるガリウム,インジウムおよびタリウムの検出
- 硝酸バリウム融解による有機化合物中のイオウの検出
- 酸化バメナジウム(5)融解による有機化合物中の諸元素の検出
- ハロゲン化物の乾式判別
- フェノールによるウランの検出(ノート)
- 酸化マンガン(4)による過ヨウ素酸の検出(ノート)
- 鉄(II)-ジメチルグリオキシムによるニトロ化合物の確認(ノート)