スズ地金中の銅のジエチルジチオカルバミン酸ナトリウムによる光度定量法
スポンサーリンク
概要
- 論文の詳細を見る
An accurate and rapid procedure for the determination of a small amount of copper in tin metal has been devised by utilizing the cupric dieth yldithiocarbamate method after the removal of a large portion of the Sn. In carrying out the procedure, the sample is dissolved in conc HCl, the solution is diluted to below 0.3 <I>N</I> HCl with water, all of the Sn is practically precipitated and separated by addition of a saturated oxalic acid solution, while the copper is completely masked by E. D. T. A. A suitable amount of the filtrate is transferred into a separatory funnel, and the E. D. T. A. - cupric comblex salt is demasked by adding a few drops of an aqueous solution of ferric ammonium sulfate.<BR>The copper is extracted by CCl<SUB>4</SUB>-diethyl dithiocarbamate solution, and therefore its coloration can be measured by the well-known cupric diethyl dithiocarbamate method.
- 社団法人 日本分析化学会の論文