Investigation of characteristics of non-reductive thermal ion emission of various graphites in thermal ionization mass spectrometry Original Research Article

The characteristics of non-reductive thermal ion emission in thermal ionization mass spectrometry for six kinds of graphite with different origins, purity and crystal structure and one high pure carbon powder are studied. The results show that the efficacy of non-reductive thermal ion emission of graphite is weakly related to the purity and particle size of graphite while dependent on the crystal microstructure of graphite. Graphite with a perfect crystal structure has a higher efficiency of non-reductive thermal ion emission.