| 摘要 |
PURPOSE:To quantitatively measure a minute amount of sulfur with good accuracy within a short time, by converting sulfur to a sulfate ion form from a sulfur-containing rubber material and analyzing the same by a fine tube type uniform velocity electrophoretic analyzer. CONSTITUTION:A sulfur-containing rubber material is crushed and burnt to generate combustion gas which is, in turn, absorbed by an absorbing solution (e.g., an aqueous H2O2 solution, an aqueous Br2 solution) to convert sulfur to a sulfate ion. Next, the specimen of this absorbing solution is injected in a fine tube type uniform velocity electrophoretic apparatus by a microsyringae which the length of the zone between detection peaks is detected and the amount of the sulfate ion is quantitatively analyzed to calculate the sulfur in the specimen. By this method, for example, sulfur contained in 30mg of a specimen can be measured within about 30min in the order of 10<-2>wt%. Therefore, by measuring sulfur by the fine tube type uniform velocity electrophoretic analyzer, a minute amount of sulfur can be measured with high accuracy within a short time. |
