Determination and Distribution of Lanthanoids in Hard Tissue (Shell and Pearl) of Shellfish by ICP-MS.

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  • FUJINO Osamu
    Research Institute for Science and Technology, Kinki University
  • TERADA Eriko
    Research Institute for Science and Technology, Kinki University

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  • Determination and Distribution of Lanth

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Abstract

Lanthanoid elements in hard tissue (shell and pearl) of shellfish were determined and their distributions were examined by ICP-MS. The ICP-MS signals for Lanthanoids contained in these samples were highly suppressed by coexisting calcium, the macro-component, which made the determination of lanthanoids difficult. To resolve this problem, we applied the coprecipitation method with ferric hydroxide to separate the lanthanoids from the interfering element, calcium. All the lanthanoids were coprecipitated quantitatively and separated at pH 9. Pearl and shell samples were dissolved in inorganic acids and filtered, then the 14 lanthanoid elements in the sample solution were simultaneously determined. The lanthanoids contents in hard tissues ranged from 0.25 to 82ppb in Akoya-gai of seawater shellfish, and from 0.3 to 72ppb in the Ikecho-gai of Lake Biwa. It was found that the distribution of lanthanoid elements in these samples followed the Oddo and Harkins law.

Journal

  • Analytical Sciences

    Analytical Sciences 12 (6), 963-967, 1996

    The Japan Society for Analytical Chemistry

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