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Effect of Microstructure of Graphite on the Nonreductive Thermal Ion Emission in Thermal Ionization Mass Spectrometry
Wei, H. Z.2; Jiang, S. Y.1; Xiao, Y. K.1
2010-02-25
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY A
Volume114Issue:7Pages:2427-2437
SubtypeArticle
AbstractThe emission behavior of polyatomic ions in the ionization source of thermal ionization mass spectrometry (TIMS) was investigated. The results Suggest that the presence of a graphite promoter plays a key role for the formation and stable emission of polyatomic ions, such as M(2)X(+), M(2)BO(2)(+), Cs(2)NO(2)(+), and Cs(2)CNO(+). Our data further implied that the intensity of M(2)X(+) and M(2)BO(2)(+) increases and the emission temperature decreases with increasing cationic and anionic radius. During the boron isotopic measurement using the Cs(2)BO(2)(+)-graphite-PTIMS method, the isobaric interference ion Cs(2)CNO(+) cannot be transformed from nitrate or organic compounds containing an amide group but can be induced by the existence of trace amounts of boron because of its special electron-deficiency property (B(3+)). Characterization on the planar crystalline structure of various graphite samples with SEM, TEM, and Raman spectroscopy confirmed the relationship of the emission capacity of polyatomic ions and the crystal microstructure of graphite and provides direct evidence that graphite with a perfect parallel and equidistant layer orientation shows a beneficial effect on the emission of polyatomic ions in TIMS. The mechanism study on the formation of polyatomic ions opens the possibility to establish high precision methods for isotopic composition analysis of more nonmetal elements with the TIMS technique.
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordPRECISION ISOTOPIC MEASUREMENT ; SCANNING-TUNNELING-MICROSCOPY ; PHOTOCATALYTIC OXIDATION ; BORON ISOTOPE ; AMORPHOUS-CARBON ; CS2CL+ ION ; CHLORINE ; CYANIDE ; TIO2 ; ELECTRODES
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000274578200003
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5924
Collection青海盐湖研究所知识仓储
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810003, Peoples R China
2.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
Wei, H. Z.,Jiang, S. Y.,Xiao, Y. K.. Effect of Microstructure of Graphite on the Nonreductive Thermal Ion Emission in Thermal Ionization Mass Spectrometry[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2010,114(7):2427-2437.
APA Wei, H. Z.,Jiang, S. Y.,&Xiao, Y. K..(2010).Effect of Microstructure of Graphite on the Nonreductive Thermal Ion Emission in Thermal Ionization Mass Spectrometry.JOURNAL OF PHYSICAL CHEMISTRY A,114(7),2427-2437.
MLA Wei, H. Z.,et al."Effect of Microstructure of Graphite on the Nonreductive Thermal Ion Emission in Thermal Ionization Mass Spectrometry".JOURNAL OF PHYSICAL CHEMISTRY A 114.7(2010):2427-2437.
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