Problems of the SPring-8 Forensic Analysis of Sumitomo Metal Mining As<sub>2</sub>O<sub>3</sub> 25-Lots at the Wakayama Arsenic Curry Incidence

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Other Title
  • 和歌山カレーヒ素事件における住友金属鉱山製亜ヒ酸25缶のSPring-8鑑定の問題点

Abstract

<p>Problems of synchrotron radiation X-ray fluorescence (SR-XRF) analysis is studied based on the forensic analysis of the Wakayama Arsenic Curry Murder Incident. In this case, 25 cans of As2O3 produced by Sumitomo Metal Mining Co. Ltd. were measured by Prof. Nakai at SPring-8 BL08W in order to prove that the concentration of impurity element Sb was changed as the change of cans. Nakai concluded in his forensic report that the relative intensity of Sb was different when the can was different. However Sb concentration of 9 of 25 cans were 120 ppm, which were analyzed by ICP-AES, and some of them were testified different by Nakai. On the other hand, some were tesfified as same concentration in spite that the concentrations were different. Based on Nakai's forensic report as well as on the testimony, the judge concluded that the arsenic poisoned the curry was identical to that of the arrested houswife and sentensed death penalty. The precision of SR-XRF is also checked for another forensic report, and again the precision was not enough for identification.</p>

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Details 詳細情報について

  • CRID
    1390578141488287616
  • DOI
    10.57415/xshinpo.51.0_119
  • ISSN
    27583651
    09117806
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Allowed

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