Determination of phenolic resin concentration in particulate matter accumulated on roads by hydrothermal decomposition-GC.

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  • NISHINO Ryo
    Kanagawa Institute of Technology,Department of Applied Chemistry
  • SAITO Takashi
    Kanagawa Institute of Technology,Department of Applied Chemistry

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  • 水熱分解ガスクロマトグラフィーによる道路上たい積粉じん中のフェノール樹脂の定量
  • スイネツ ブンカイ ガス クロマトグラフィー ニヨル ドウロジョウ タイセキ

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Abstract

A new type of method for determining concentration of phenolic resin in accumulated particulate matter on roads by hydrothermal decomposition-gas chromatography (GC) with methylation was investigated.After extracting particulate matter samples with tetrahydrofuran in an ultrasonic wave generator, 9 μl of extract was encapsulated in a pyrex glass capsule of 18 mm length and 0.8 mm i.d.with 0.5 μl of tetramethyl ammonium hydroxide as the methylating agent. The capsule was put in a cup of ferromagnetic material having a curie point of 235°C, and hydrothermal decomposition with methylation was done for 9 sec using a curie-point pyrolyzer. The capsule, after the tip was chipped off, was put in a cup of ferromagnetic material having a curie-point of 445°C, and thermal desorption was done for 9 sec in a pyrolyzer. Hydrothermal desorped decompozates were analyzed by GC. A linear relation between the amount of anisole produced and the concentration of phenolic resin was obtained. Reproducibility of the produced amount of anisole was 3.6% at the relative standard deviation when 300 μg of phenolic resin was analyzed with 6 repeated measurements. The concentration of phenolic resin in accumulated particulate matter samples on roads was measured. As a result, phenolic resin of 120250 μg/g-dust was detected, and the concentration of asbestos estimated from the concentration of the phenolic resin particles was 0.044 to 0.092 wt%.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 45 (10), 915-920, 1996

    The Japan Society for Analytical Chemistry

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