Oral Sessions (Day1, Day2, Day3)
Poster Presentations (Day1, Day2, Day3)
Oral Sessions
- Day 2, June 23(Thu.) 10:40-11:00 Room C (411 and 412)
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2C-O1-1040(2P-33) PDF
On-line Elimination of Isobaric Interferences for 87Sr/86Sr Isotope Analysis though Ion-molecule Interaction in ICP-MS/MS
In order to avoid the isobaric interference of 87Rb on 87Sr for 87Sr/86Sr isotope ratios, an analytical method has been developed using ICP-MS/MS, which can remove this interference inside of the instrument. Precise 87Sr/86Sr ratios were obtained by the internal correction of mass discrimination with 86Sr/88Sr through an adequate control of the ion-molecular reaction in the collision/reaction cell by optimizing the O2 flow rate and the kinetic energy of ions, without standard-sample bracketing techniques required in previous studies. Established technique was applied to several rock samples with various Rb/Sr ratios, ages and major element compositions, and consistent results with conventional methods were obtained in wide range of 87Sr/86Sr ratios.