Makishima, Akio & Nakamura, Eizo (2002) Response to “Comment by W.R.Kelly, R.D.Vocke, Jr., and J.L.Mann on ‘Determination of total S at μg g-1 levels in geological materials by oxidation of S into SO₄²- with in situ generation of Br using ID-HR ICPMS' by A. Makishima and E. Nakamura, Analytical Chemistry, 74, 6432-6432, doi: 10.1021/ac026226x. < 20200423143334-226504 > pub
  • abstract:

    Makishima and Nakamura (M&N) reported a new determination method of sulfur content in geological materials by isotope dilution using high resolution ICPMS. In this paper, sulfur contents of 10 silicate reference materials, including BCR-1, which has been one of the most important reference materials for nearly 40 years, in addition to WMS-1 and the Smithsonian reference Allende powder were determined. The method seems to be theoretically robust; however, Kelly et al. claimed that the sulfur content of BCR-1 by M&N (474 ± 14 μg g-1, 1σ) is too high beyond the 95% confidence intervals of the consensus values of Gladney et al. (410 ± 50μg g-1), Watanabe (441 ± 1.5μg g-1), and new analyses of KVM (446.8 ± 2.6; 438.7 ± 2.0μg g-1) by Carius tube digestion using isotope dilution−thermal ionization mass spectrometry.

  • doi: 10.1021/ac026226x
  • modified at 2020-04-23
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  • name
  • Makishima, Akio
  • Nakamura, Eizo