The infra-redspectra showed that the main chromophoric groups (conjugated carbonyl groups) were destroyed by bleaching agents, which was the main reason of brightness incremsent.
红外光谱表明,主要发色基团(共轭羰基)被漂剂破坏,这是提高浆白度的主要原因。
2
The infra - redspectra of quinones present a number of interesting features.
醌类的红外光谱具有一些有趣的性质。
3
The molecular weight distributions, infra-red, ultraviolet and nuclear magnetic resonance spectra for the polysilane polymers have been described.