Determination of stable isotope ratios of Ba by 130Ba–135Ba double-spike total evaporation method using thermal ionization mass spectrometry (DS-TEV-TIMS)

Takashi Miyazaki; Jun-Ichi Kimura; Shigeyuki Wakaki; Bogdan Stefanov Vaglarov; Satoru Haraguchi

doi:10.5918/jamstecr.27.109

報告

Determination of stable isotope ratios of Ba by ¹³⁰Ba–¹³⁵Ba double-spike total evaporation method using thermal ionization mass spectrometry (DS-TEV-TIMS)

Takashi Miyazaki, Jun-Ichi Kimura, Shigeyuki Wakaki, Bogdan Stefanov Vaglarov, Satoru Haraguchi

著者情報

キーワード: Stable Ba isotope, double spike, total evaporation, TIMS, NIST SRM 3104a

ジャーナルフリー HTML

2018 年 27 巻 p. 109-118

DOI https://doi.org/10.5918/jamstecr.27.109

詳細

抄録

An analytical method for determining the stable isotope ratios of Ba was developed by using thermal ionization mass spectrometry (TIMS) and the ¹³⁰Ba–¹³⁵Ba double-spike total evaporation method (DS-TEV). We determined the isotope ratios of the ¹³⁰Ba–¹³⁵Ba double spike to be ¹³⁴Ba/¹³⁰Ba = 0.076623, ¹³⁵Ba/¹³⁰Ba = 1.081975, and ¹³⁷Ba/¹³⁰Ba = 0.209356 by using the intercept values of the mass-dependent fractionation lines and mixing line.

The measured repeatability of δ^137/134Ba of the National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 3104a was ±0.018‰ (2SD: 2 standard deviations, n = 7) based on the double-spike total evaporation method using thermal ionization mass spectrometry (DS-TEV-TIMS). The repeatability is comparable to or better than the best repeatability of Ba isotope ratios ever reported.

責任著者(Corresponding author)

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