Development of Wastewater Certified Reference Material for Determination of Dioxins

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  • ダイオキシン類分析用排水認証標準物質の開発
  • ダイオキシンルイ ブンセキヨウ ハイスイ ニンショウ ヒョウジュン ブッシツ ノ カイハツ

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Abstract

The Japan Society for Chemical Analysis has developed a wastewater certified reference material for the determination of dioxins (polychlorodibenzo-p-dioxins, polychlorodibenzofurans and dioxin-like polychlorobiphenyls). This reference material is the first wastewater certified reference material for the analysis of dioxins. There has been no wastewater reference material until now because wastewater is heterogeneous, consisting of water and fine suspended substances where almost all of the dioxins are absorbed; it has been considered that the reference material should be homogeneous, in principle. Then, after setting a principle that the total content of a bottle should be analyzed in one analysis, the project team obtained a success to develop a wastewater certified reference material by studying the sampling methods of wastewater to many bottles. An interlaboratory comparison test was performed by participants from 26 laboratories. Certified values with uncertainty were obtained by treating reported data statistically after rejecting outliers. The certified value of this reference material is 13.81 TEQ pg L−1, which is on the same level to as the wastewater quality of dioxins issued as the Japanese governmental standard.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 56 (1), 17-28, 2007

    The Japan Society for Analytical Chemistry

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