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1994 Fiscal Year Final Research Report Summary

STUDIES ON BEHAVIOR OF HIGH-TECHNOLOGY RELATED ELEMENT GALLIUM IN SIOL ENVIRONMENT

Research Project

Project/Area Number 05680448
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Environmental dynamic analysis
Research InstitutionTHE UNIVERSITY OF TOKUSHIMA

Principal Investigator

OKAMOTO Kensaku  UNIV TOKUSHIMA,PHARM.SCI., PROFESSOR, 薬学部, 教授 (10101049)

Project Period (FY) 1993 – 1994
KeywordsGallium / Graphite Furnace Atomic Absrption Spectrometry / Matrix Modifier / Rock Reference Material / Inductively Coupled Plasma Mass Spectrometry / Isotope Ratio Measurement
Research Abstract

In order to establish an analytical method for trance determination of gallium in soil samples, graphite furnace atomic absorption spectrometry (GFAAS) using a Ta-coated graphite tube was examined. Matrix elements in soil such as Al, Ca, Fe, K,Mg, Na each showed signal enhancement of Ga in the concentration range from 100 to 1,000 ppm. A mixture of Al (500ppm), Ni (500ppm) and IM nitric acid was used as a most suitable matrix-modifier in this experiment. Gallium in rock reference materials (JA-1, JB-3, JLk-1) issued by Geological Survey of Japan was determined by Ta-coated GFAAS using the matrix-modifier. The analytical values obtained were in good agreement with the recommended values when standard additions method was employed. Gallium contents in soils determined by the above-mentioned method ranged from 20 to 50 ppm, consistent with reported values on Japanese soils.
Inductively coupled plasma mass spectrometry (ICP-MS) was applied for the determination of Ga in soil digests. For the analysis of water samples, a linear calibration curve was obtained in the concentration range of ppt. However, there exists a severe mass overlapping interference due to C10 molecular ion in the case of Ga determination. An extraction of Ga from the soil matrix with 5-octyloxymethyl-8-quinolinol in chloroform followed by back-extraction with nitric acid was performed. In order to compensate for extraction efficiency, the use of isotope dilution mass spectrometry was recommended to obtain an accurate result on Ga in soil samples.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] H.Morita: "Analysis of serum elements and the contaminations from devices used for serum preparation by ICP mass spectrometry" Science Total Environment. 151. 9-17 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Okamoto: "Biologioal and Environmental Reference Materials from National Institute for Environmental Studies" Mikrochem.Acta. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岡本研作: "プラズマイオン源質量分析" 河口広司,中原武利, 320 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岡本研作: "薬学機器分析学" 森逸男,千熊正彦, 300 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Morita: "Analysis of Serum Elements and the Contaminations from Devices Used for Serum Preparation by ICP Mass Spectrometry" Sci.Total Environ.151. 9-17 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okamoto: "Biological and Environmental Reference Materials from National Institute for Environmental Studies" Mikrochem.Acta. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okamoto: Plasma Ion Source Mass Spectrometric Analysis (eds) H.Kawaguchi and T.Nakahara. 320 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okamoto: Modern Instrumental Analysis in Pharaceutical Science (eds) I.Mori and M.Chikuma. 300 (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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