38.ヨウ素添加法を用いた石炭中の常磁性種の評価

抄録

EPR power saturation for both original and iodine doped coals has been measured in order to evaluate paramagnetic species in the coals. The EPR spectra of high rank coal consist of two components, one broad and one narrow singal. The power saturation characteristics of the broad signal changed with iodine doping, while that of narrow signal did not change. For low rank coal, no significant change was observed in EPR spactra and power saturation charactaristics with iodine doping.