Development of the Certified Reference Materials, Plastics (JSAC 0631, JSAC 0632) for Determination of Hazardous Metals by X-Ray Fluorescence Analysis

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  • 有害金属成分蛍光X線分析用プラスチック認証標準物質JSAC 0631, 0632の開発
  • テクノレポート 有害金属成分蛍光X線分析用プラスチック認証標準物質JSAC 0631,0632の開発
  • テクノ レポート ユウガイ キンゾク セイブン ケイコウ Xセン ブンセキヨウ プラスチック ニンショウ ヒョウジュン ブッシツ JSAC 0631 0632 ノ カイハツ

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Abstract

The Japan Society for Analytical Chemistry has developed plastic certified reference materials (CRMs) for the X-ray fluorescent analysis of four hazardous elements: Pb, Cd Cr and Hg in plastics. Disk samples were prepared by filling Al-cylindrical molds with the raw material liquid of polyester resin mixed with hardener and organometallic compounds. Thus 360 candidate reference materials of JSAC 0631 and 0632 were obtained. Both surfaces on prepared disks obtained after 12 h of hardening at room temperature were ground and polished by a milling machine at 4.00±0.05 mm thick. The homogeneity of the prepared disks was shown excellently. An interlaboratory comparison study was performed by 24 laboratory's participants. In a statistical evaluation for the interlaboratory study, z-scores in the "robust method" were applied in order to reject outlier. The certified uncertainties for prepared CRMs were determined at in the confidence levels of 95%.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 56 (5), 363-370, 2007

    The Japan Society for Analytical Chemistry

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