Comparative Study of Activation Analyses for the Determination of Trace Halogens in Geological and Cosmochemical Samples

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  • NAKAMOTO Tomoshi
    Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
  • OURA Yasuji
    Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
  • EBIHARA Mitsuru
    Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University

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Halogens (fluorine, chlorine, bromine and iodine) were determined by activation analyses (neutron activation analysis (NAA), photon activation analysis (PAA) and prompt gamma-ray analysis (PGA)) for geological and cosmochemical solid samples. We studied how each analytical method was for the determination of trace amounts of halogens in rock samples. Radiochemical NAA (RNAA) showed the highest analytical reliability for three halogens (chlorine, bromine and iodine), whereas a set of four halogens (fluorine, chlorine, bromine and iodine) could be determined in principle by radiochemical PAA (RPAA) from a single specimen. Although it is a non-destructive method, PGA showed an analytical sensitivity for chlorine comparable to those of RNAA and RPAA.

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  • Analytical Sciences

    Analytical Sciences 23 (9), 1113-1119, 2007

    社団法人 日本分析化学会

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