Rapid determination of lead in thermally cracked gasoline by graphite furnace AAS

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  • NAKAMOTO Yoshikazu
    Chemicals Research Laboratory Application Reseach Section, Idemitsu Petrochemical Co., Ltd.

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Other Title
  • 黒鉛炉原子吸光法による分解油中微量鉛の迅速定量
  • コクエンロ ゲンシ キュウコウホウ ニ ヨル ブンカイユチュウ ビリョウ ナマリ ノ ジンソク テイリョウ

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Abstract

A simple and rapid method was established for the direct determination of lead in thermally cracked gasoline using graphite-furnace AAS. Lead compounds in thermally cracked gasoline are known to be catalyst poisons in the aromatization process. Therefore, it is important to determine trace lead in thermally cracked gasoline. The volatilization of organic lead from the furnace was suppressed by the addition of iodine and the atomic absorption sensitivities of inorganic and organic lead compound became identical. Therefore, it was possible to use inorganic lead as a standard compound for the calibration curve. The detection limit and relative standard deviation were estimated to be 5 ng g−1 and 3.8% for lead determination (20 ng ml−1), respectively. The interference of thermally cracked gasolines and other metals were not observed. Analytical time of the proposed method was 20 min per one sample.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 53 (1), 13-16, 2004

    The Japan Society for Analytical Chemistry

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