Abstract
Methods of preparation of a series of polyhalogenated dibenzo-p-dioxines containing the trifluoromethyl group in the 2 position are described. The physicochemical properties of these compounds are studied, electron impact mass spectra are discussed, and relative retention times are measured. In their gas-chromatographic and mass-spectral characteristics, some of the synthesized compounds are ,suited for use as internal standards in the quantitative determination of polychlorinated dibenzo-p-dioxines and dibenzofurans in the environment by means of the chromato-mass-spectrometric method.
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