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Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometric quantification of $$^{90}$$Sr using $$^{88}$$Sr/$$^{86}$$Sr isotope dilution method

Yanagisawa, Kayo*; Odashima, Mizuki*; Matsueda, Makoto   ; Furukawa, Makoto*; Takagai, Yoshitaka*

The determination of a low concentration of $$^{90}$$Sr was achieved by the combination of online SPE-ICP-QMS and ID method using $$^{88}$$Sr/$$^{86}$$Sr ratio. No requirement of radioactive standard material and the preparation process of the calibration curve was in the quantification process and data acquisition can be in one-shot sample injection. The proposed method allowed the rapid (within 15 min/sample) quantification of $$^{90}$$Sr in the presence of significant interferences such as isobaric $$^{90}$$Zr and other elements. The LOD for $$^{90}$$Sr was 5.6 Bq/L for a 10 mL injection and this could be improved by simply increasing the sample volume injected.

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