样品化学环境对激光质谱的影响

本文从三个方面研究了样品化学环境对激光解吸质谱行为的影响，利用ＮＣ膜对水溶液的吸附作用并以此为基底，研究了水溶液中中性分子Ｎ，Ｎ，Ｎ’，Ｎ’－四甲基－１，４苯二胺（ＴＭＰＤ）（电子供体）与苯醌（ＢＱ）（电子受体）之间的电荷转移对质谱图分子离子峰强度的影响；并用此法对４－氨基－ｎ－丁酸和２－萘酚的ＰＫ值进行测定；同时也研究了镁、铜和钴四苯基卟啉化合物在弱酸性的固相基体中激光质谱行为。研究结果说明了化学环境对激光质谱行为的密切关联。

Influences of Sample Chemical Environment on Laser Mass Spectrometry

Results from the fellowing studies indicate that sample chemical environment is closely related to their laser mass spectral behavior:The influence of charge transfer between TMPD(N,N,N',N'-tetramethy1-1,4benzendiamine)and BQ(p-benzoquinone)in neutral solution on the intensity of the molecular ion peak in its mass spectrum;determination of pk values for 4-amino-n-butyric acid and 2-naphthol;and the laser mass spectral behavior of magnesium,copper and cobalt tetraphenyl porphyrins in solid matrix of weak acid.