| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a measuring method for the concentration of a silanol group in a substance containing moisture in a trace amount. SOLUTION: In the method, the concentration of the silanol group in a sample containing the moisture in the trace mount is measured by a near-infrared and infrared absorptiometric method. In the measuring method, an extinction (A1 ) at a band of a wave number of 3,500 to 3,800 cm<-1> as the characteristic absorption band of both water and the silanol group and an extinction (A2 ) at a band of a wave number of 5,100 to 5,400 cm<-1> as the characteristic absorption band of only the water are measured by a transmission method in a state that the sample is put into a cell, and the concentration of the silanol group in the sample is measured on the basis of an extinction (A4 ) which subtracts an extinction (A3 ) based on a moisture amount corresponding to the extinction (A2 ) from the extinction (A1 ).</p> |
