| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To determinate a very small amount of silicon with high sensitivity/high precision in a back extraction method of silicomolybdic acid, and a silicon quantifying method using silicomolybdic acid (blue) absorptiometric method. <P>SOLUTION: The back extraction method of silicomolybdic acid includes a process for preparing a silicon-containing hydrochloric acid sample solution, a process for converting silicon in the hydrochloric acid sample solution to silicomolybdic acid (yellow), a process for extracting silicomolybdic acid (yellow) with MIBK and a process for performing the back extraction of silicomolybdic acid (yellow) to reduce silicomolybdic acid (yellow) to silicomolybdic acid (blue). In the silicon quantifying method using the silicomolybdic acid (blue) absorptiometric method, the silicomolybdic acid (blue) solution extracted by the back extraction method of silicomolybdic acid is quantitatively analyzed by a absorptiometric method. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
