摘要
含氢甲基硅油是高分子量的多聚物，用质谱方法对其Ｓｉ－Ｈ键上的氢含量的测定，仅用测定其分子量的办法不易实现。实验中发现，用其两个碎片离子ＳｉＯ（ＣＨ３）２－和ＳｉＯ－ＨＣＨ３＋作为代表性离子，以它们的丰度比定出甲基合氢硅油的含氧量［Ｈ］。结果与用化学方法所测值十分接近。
Si-H bond in polydimethylhydrosiloxanes plays an important role in organic silicon industry. It is not easy to determnine the amount of Si-H bond in ploydimethlhydrosilioxanes using the molecular ions in mass spectrometry. We found that the amount of Si-H can be de- fined by the characteristic ions of SiO[CH3]2 and SiOHCH3.By comparing the intensities of m/z 59(y) and m/z 74(x) peaks in mass spectrum, the active hydrogen content can be deter- mined. Results obtained by this method can match the current chemical method.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第3期311-313,共3页
Chinese Journal of Analytical Chemistry
