Microanalysis of some carcinogenic polycyclic aromatic nitrocompounds by preresonance Raman spectrometry.

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  • HIGUCHI Seiichiro
    Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo
  • ZHENG Zegen
    Faculty of Base, Institute of Chongqing Architectural Engineering, Chongqing, Sichuan, China
  • TANAKA Shigeyuki
    Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo

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Other Title
  • 前期共鳴ラマン効果を利用する発がん性多環芳香族ニトロ化合物の微量分析
  • ゼンキ キョウメイ ラマン コウカ オ リヨウスル ハツガンセイ タカン ホウ

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Abstract

The microanalytical examinations were made by the preresonance Raman spectrometry for 2-nitrofluorene, 1-nitropyrene, 4-nitrobiphenyl, 5-nitroacenaphthene, and 4, 4'-dinitrobiphenyl. They are found in airborne particles sampled at highways or in the waste gases of coals as components soluble in organic solvents. These samples have UV absorption bands in the wavelength region from about 300 to 400 nm. The wavelength of the excitation laser line is 488.0 nm. The resonance enhancement of the intensities of Raman bands was observed by the laser excitation at 488.0 nm. It was shown that the fluorescence background became markedly lower when the sample solutions were exposed to laser irradiation, at least, in this particular case using CCl4 as a solvent. The excellent selectivity of the present method was demonstrated by comparing the spectra of each compound with those of mixed samples. The detection limits determined from the NO2 symmetric stretching band and the bands inherent in each sample, ranged from 10-6 M to 10-8 M. The analytical curves were linear over a wide concentration range. It was concluded that the Raman spectrometry is one of the very useful methods for identification and determination of the carcinogenic nitrocompounds in environmental samples.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 34 (9), 529-533, 1985

    The Japan Society for Analytical Chemistry

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