マスフラグメントグラフィーによる土壤中の多環芳香族炭化水素の定量

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  • Mass fragmentographic determination of polynuclear aromatic hydrocarbons in soil.
  • マスフラグメントグラフィによる土壌中の多環芳香族炭化水素の定量〔英文〕
  • マスフラグメントグラフィ ニヨル ドジョウチュウ ノ タカン ホウコウゾク タ

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The mass fragmentographic determination of polynuclear aromatic hydrocarbons (PAH) in soils is described. Mass fragmentography, using a combination of gas chromatography and mass spectrometry, is superior to other methods because of its quick separation, specificity of mass spectra and high sensitivity. The method was as follows: i) PAH in soil were extracted with a benzene-methanol mixture (10:3) by shaking. ii) Interfering compounds were eliminated on a florisil column with benzene. iii) The concentrated benzene was fractionated on a silicic acid column. The first fraction contained aliphatic hydrocarbons, was eluted with isooctane. And the second containing the PAH with isooctane-benzene mixture (1:1). iv) A mass fragmentographic analysis (20eV) of the PAH was performed.<br>The recovery of PAH in soil samples was greater than 80% for those amounts ranging from 20 to 200μg. Using the present method, for soil samples collected in the Hirakata Bay area, PAH were identified as anthracene+phenanthrene, fluoranthene, pyrene, benzo(a)fluorene, benzo(a)anthracene, chrysene, benzo(a)pyrene (benzo(e)pyrene), dibenzo(a, h)anthracene and benzo(ghi)perylene, which were found to range in concentration from 0.014mg/kg to 8.44mg/kg for dry samples.

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