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Gas Chromatographic Determination of Benzoic Acid and Toluic Acid in Airborne Particulates

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Abstract

A method for sensitive determination of aromatic carboxylic acids in airborne particulates is described. Airborne particulates are collected on silica fiber filters with a high volume air sampler. Aromatic carboxylic acids in the samples are extracted with 0.2 mol dm-3 sodium hydroxide by heating at 70°C. The carboxylic acids are derivatized with pentafluorobenzyl bromide, and cleaned up through a Sep-Pak NH2 cartridge. The resulting derivatives are determined sensitively and selectively with a gas chromatograph equipped with an electron capture detector. The detection limit is 0.02 μg for o-, m- and p-toluic acids, and 0.03 μg for benzoic acid.

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Authors and Affiliations

  1. Gifu Prefectural Research Institute for Environmental Pollution, Yabuta, Gifu, 500, Japan

    Harumitsu Njshikawa

  2. Department of Chemistry, Asahi University, Hozumi, Gifu, 501-02, Japan

    Tadao Sakai

  3. Faculty of Pharmaceutical Sciences, Nagoya City University, Tanabedori, Mizuho, Nagoya, 467, Japan

    Yoshinori Kidani

Authors
  1. Harumitsu Njshikawa
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  2. Tadao Sakai
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  3. Yoshinori Kidani
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Njshikawa, H., Sakai, T. & Kidani, Y. Gas Chromatographic Determination of Benzoic Acid and Toluic Acid in Airborne Particulates. ANAL. SCI. 3, 463–466 (1987). https://doi.org/10.2116/analsci.3.463

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  • DOI: https://doi.org/10.2116/analsci.3.463

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