Abstract
Relative intensity of three dominant ions per mole in mass spectra of many halogenated benzene compounds, compared with ion at m/z 172 in the mass spectrum of 2-fluorobiphenyl (internal standard), has been measured by using mass chromatography in capillary GC/MS. Large variation of the relative intensity was obtained, but calibration curve showed linearity between 1100 ng of individual compounds. Relative intensity depended also upon molecular structure and/or chemical properties of the cpmpounds. Substitution by iodine atom in benzene ring enhanced the molar relative intensity of halogenated benzene compounds.
